PNG Thumbnails being modified on clone

[levivoelz]

I get the following warning when cloning the repo:

Encountered 121 file(s) that should have been pointers, but weren't:
	src/images/sad-scutoid.png
	src/images/thumbnails/augmented-dodecahedron.png
	src/images/thumbnails/augmented-hexagonal-prism.png
	src/images/thumbnails/augmented-pentagonal-prism.png
	src/images/thumbnails/augmented-sphenocorona.png
	src/images/thumbnails/augmented-triangular-prism.png
	src/images/thumbnails/augmented-tridiminished-icosahedron.png
	src/images/thumbnails/augmented-truncated-cube.png
	src/images/thumbnails/augmented-truncated-dodecahedron.png
	src/images/thumbnails/augmented-truncated-tetrahedron.png
	src/images/thumbnails/biaugmented-pentagonal-prism.png
	src/images/thumbnails/biaugmented-triangular-prism.png
	src/images/thumbnails/biaugmented-truncated-cube.png
	src/images/thumbnails/bigyrate-diminished-rhombicosidodecahedron.png
	src/images/thumbnails/bilunabirotunda.png
	src/images/thumbnails/cube.png
	src/images/thumbnails/cuboctahedron.png
	src/images/thumbnails/decagonal-antiprism.png
	src/images/thumbnails/decagonal-prism.png
	src/images/thumbnails/diminished-rhombicosidodecahedron.png
	src/images/thumbnails/disphenocingulum.png
	src/images/thumbnails/dodecahedron.png
	src/images/thumbnails/elongated-pentagonal-bipyramid.png
	src/images/thumbnails/elongated-pentagonal-cupola.png
	src/images/thumbnails/elongated-pentagonal-gyrobicupola.png
	src/images/thumbnails/elongated-pentagonal-gyrobirotunda.png
	src/images/thumbnails/elongated-pentagonal-gyrocupolarotunda.png
	src/images/thumbnails/elongated-pentagonal-orthobicupola.png
	src/images/thumbnails/elongated-pentagonal-orthobirotunda.png
	src/images/thumbnails/elongated-pentagonal-orthocupolarotunda.png
	src/images/thumbnails/elongated-pentagonal-pyramid.png
	src/images/thumbnails/elongated-pentagonal-rotunda.png
	src/images/thumbnails/elongated-square-bipyramid.png
	src/images/thumbnails/elongated-square-cupola.png
	src/images/thumbnails/elongated-square-gyrobicupola.png
	src/images/thumbnails/elongated-square-pyramid.png
	src/images/thumbnails/elongated-triangular-bipyramid.png
	src/images/thumbnails/elongated-triangular-cupola.png
	src/images/thumbnails/elongated-triangular-gyrobicupola.png
	src/images/thumbnails/elongated-triangular-orthobicupola.png
	src/images/thumbnails/elongated-triangular-pyramid.png
	src/images/thumbnails/gyrate-bidiminished-rhombicosidodecahedron.png
	src/images/thumbnails/gyrate-rhombicosidodecahedron.png
	src/images/thumbnails/gyrobifastigium.png
	src/images/thumbnails/gyroelongated-pentagonal-bicupola.png
	src/images/thumbnails/gyroelongated-pentagonal-birotunda.png
	src/images/thumbnails/gyroelongated-pentagonal-cupola.png
	src/images/thumbnails/gyroelongated-pentagonal-cupolarotunda.png
	src/images/thumbnails/gyroelongated-pentagonal-pyramid.png
	src/images/thumbnails/gyroelongated-pentagonal-rotunda.png
	src/images/thumbnails/gyroelongated-square-bicupola.png
	src/images/thumbnails/gyroelongated-square-bipyramid.png
	src/images/thumbnails/gyroelongated-square-cupola.png
	src/images/thumbnails/gyroelongated-square-pyramid.png
	src/images/thumbnails/gyroelongated-triangular-bicupola.png
	src/images/thumbnails/gyroelongated-triangular-cupola.png
	src/images/thumbnails/hebesphenomegacorona.png
	src/images/thumbnails/hexagonal-antiprism.png
	src/images/thumbnails/hexagonal-prism.png
	src/images/thumbnails/icosahedron.png
	src/images/thumbnails/icosidodecahedron.png
	src/images/thumbnails/metabiaugmented-dodecahedron.png
	src/images/thumbnails/metabiaugmented-hexagonal-prism.png
	src/images/thumbnails/metabiaugmented-truncated-dodecahedron.png
	src/images/thumbnails/metabidiminished-icosahedron.png
	src/images/thumbnails/metabidiminished-rhombicosidodecahedron.png
	src/images/thumbnails/metabigyrate-rhombicosidodecahedron.png
	src/images/thumbnails/metagyrate-diminished-rhombicosidodecahedron.png
	src/images/thumbnails/octagonal-antiprism.png
	src/images/thumbnails/octagonal-prism.png
	src/images/thumbnails/octahedron.png
	src/images/thumbnails/parabiaugmented-dodecahedron.png
	src/images/thumbnails/parabiaugmented-hexagonal-prism.png
	src/images/thumbnails/parabiaugmented-truncated-dodecahedron.png
	src/images/thumbnails/parabidiminished-rhombicosidodecahedron.png
	src/images/thumbnails/parabigyrate-rhombicosidodecahedron.png
	src/images/thumbnails/paragyrate-diminished-rhombicosidodecahedron.png
	src/images/thumbnails/pentagonal-antiprism.png
	src/images/thumbnails/pentagonal-bipyramid.png
	src/images/thumbnails/pentagonal-cupola.png
	src/images/thumbnails/pentagonal-gyrobicupola.png
	src/images/thumbnails/pentagonal-gyrocupolarotunda.png
	src/images/thumbnails/pentagonal-orthobicupola.png
	src/images/thumbnails/pentagonal-orthobirotunda.png
	src/images/thumbnails/pentagonal-orthocupolarotunda.png
	src/images/thumbnails/pentagonal-prism.png
	src/images/thumbnails/pentagonal-pyramid.png
	src/images/thumbnails/pentagonal-rotunda.png
	src/images/thumbnails/rhombicosidodecahedron.png
	src/images/thumbnails/rhombicuboctahedron.png
	src/images/thumbnails/snub-cube.png
	src/images/thumbnails/snub-disphenoid.png
	src/images/thumbnails/snub-dodecahedron.png
	src/images/thumbnails/snub-square-antiprism.png
	src/images/thumbnails/sphenocorona.png
	src/images/thumbnails/sphenomegacorona.png
	src/images/thumbnails/square-antiprism.png
	src/images/thumbnails/square-cupola.png
	src/images/thumbnails/square-gyrobicupola.png
	src/images/thumbnails/square-orthobicupola.png
	src/images/thumbnails/square-pyramid.png
	src/images/thumbnails/tetrahedron.png
	src/images/thumbnails/triangular-bipyramid.png
	src/images/thumbnails/triangular-cupola.png
	src/images/thumbnails/triangular-hebesphenorotunda.png
	src/images/thumbnails/triangular-orthobicupola.png
	src/images/thumbnails/triangular-prism.png
	src/images/thumbnails/triaugmented-dodecahedron.png
	src/images/thumbnails/triaugmented-hexagonal-prism.png
	src/images/thumbnails/triaugmented-triangular-prism.png
	src/images/thumbnails/triaugmented-truncated-dodecahedron.png
	src/images/thumbnails/tridiminished-icosahedron.png
	src/images/thumbnails/tridiminished-rhombicosidodecahedron.png
	src/images/thumbnails/trigyrate-rhombicosidodecahedron.png
	src/images/thumbnails/truncated-cube.png
	src/images/thumbnails/truncated-cuboctahedron.png
	src/images/thumbnails/truncated-dodecahedron.png
	src/images/thumbnails/truncated-icosahedron.png
	src/images/thumbnails/truncated-icosidodecahedron.png
	src/images/thumbnails/truncated-octahedron.png
	src/images/thumbnails/truncated-tetrahedron.png

And, with git status:

Changes not staged for commit:
  (use "git add <file>..." to update what will be committed)
  (use "git restore <file>..." to discard changes in working directory)
	modified:   src/images/sad-scutoid.png
	modified:   src/images/thumbnails/augmented-dodecahedron.png
	modified:   src/images/thumbnails/augmented-hexagonal-prism.png
	modified:   src/images/thumbnails/augmented-pentagonal-prism.png
	modified:   src/images/thumbnails/augmented-sphenocorona.png
	modified:   src/images/thumbnails/augmented-triangular-prism.png
	modified:   src/images/thumbnails/augmented-tridiminished-icosahedron.png
	modified:   src/images/thumbnails/augmented-truncated-cube.png
	modified:   src/images/thumbnails/augmented-truncated-dodecahedron.png
	modified:   src/images/thumbnails/augmented-truncated-tetrahedron.png
	modified:   src/images/thumbnails/biaugmented-pentagonal-prism.png
	modified:   src/images/thumbnails/biaugmented-triangular-prism.png
	modified:   src/images/thumbnails/biaugmented-truncated-cube.png
	modified:   src/images/thumbnails/bigyrate-diminished-rhombicosidodecahedron.png
	modified:   src/images/thumbnails/bilunabirotunda.png
	modified:   src/images/thumbnails/cube.png
	modified:   src/images/thumbnails/cuboctahedron.png
	modified:   src/images/thumbnails/decagonal-antiprism.png
	modified:   src/images/thumbnails/decagonal-prism.png
	modified:   src/images/thumbnails/diminished-rhombicosidodecahedron.png
	modified:   src/images/thumbnails/disphenocingulum.png
	modified:   src/images/thumbnails/dodecahedron.png
	modified:   src/images/thumbnails/elongated-pentagonal-bipyramid.png
	modified:   src/images/thumbnails/elongated-pentagonal-cupola.png
	modified:   src/images/thumbnails/elongated-pentagonal-gyrobicupola.png
	modified:   src/images/thumbnails/elongated-pentagonal-gyrobirotunda.png
	modified:   src/images/thumbnails/elongated-pentagonal-gyrocupolarotunda.png
	modified:   src/images/thumbnails/elongated-pentagonal-orthobicupola.png
	modified:   src/images/thumbnails/elongated-pentagonal-orthobirotunda.png
	modified:   src/images/thumbnails/elongated-pentagonal-orthocupolarotunda.png
	modified:   src/images/thumbnails/elongated-pentagonal-pyramid.png
	modified:   src/images/thumbnails/elongated-pentagonal-rotunda.png
	modified:   src/images/thumbnails/elongated-square-bipyramid.png
	modified:   src/images/thumbnails/elongated-square-cupola.png
	modified:   src/images/thumbnails/elongated-square-gyrobicupola.png
	modified:   src/images/thumbnails/elongated-square-pyramid.png
	modified:   src/images/thumbnails/elongated-triangular-bipyramid.png
	modified:   src/images/thumbnails/elongated-triangular-cupola.png
	modified:   src/images/thumbnails/elongated-triangular-gyrobicupola.png
	modified:   src/images/thumbnails/elongated-triangular-orthobicupola.png
	modified:   src/images/thumbnails/elongated-triangular-pyramid.png
	modified:   src/images/thumbnails/gyrate-bidiminished-rhombicosidodecahedron.png
	modified:   src/images/thumbnails/gyrate-rhombicosidodecahedron.png
	modified:   src/images/thumbnails/gyrobifastigium.png
	modified:   src/images/thumbnails/gyroelongated-pentagonal-bicupola.png
	modified:   src/images/thumbnails/gyroelongated-pentagonal-birotunda.png
	modified:   src/images/thumbnails/gyroelongated-pentagonal-cupola.png
	modified:   src/images/thumbnails/gyroelongated-pentagonal-cupolarotunda.png
	modified:   src/images/thumbnails/gyroelongated-pentagonal-pyramid.png
	modified:   src/images/thumbnails/gyroelongated-pentagonal-rotunda.png
	modified:   src/images/thumbnails/gyroelongated-square-bicupola.png
	modified:   src/images/thumbnails/gyroelongated-square-bipyramid.png
	modified:   src/images/thumbnails/gyroelongated-square-cupola.png
	modified:   src/images/thumbnails/gyroelongated-square-pyramid.png
	modified:   src/images/thumbnails/gyroelongated-triangular-bicupola.png
	modified:   src/images/thumbnails/gyroelongated-triangular-cupola.png
	modified:   src/images/thumbnails/hebesphenomegacorona.png
	modified:   src/images/thumbnails/hexagonal-antiprism.png
	modified:   src/images/thumbnails/hexagonal-prism.png
	modified:   src/images/thumbnails/icosahedron.png
	modified:   src/images/thumbnails/icosidodecahedron.png
	modified:   src/images/thumbnails/metabiaugmented-dodecahedron.png
	modified:   src/images/thumbnails/metabiaugmented-hexagonal-prism.png
	modified:   src/images/thumbnails/metabiaugmented-truncated-dodecahedron.png
	modified:   src/images/thumbnails/metabidiminished-icosahedron.png
	modified:   src/images/thumbnails/metabidiminished-rhombicosidodecahedron.png
	modified:   src/images/thumbnails/metabigyrate-rhombicosidodecahedron.png
	modified:   src/images/thumbnails/metagyrate-diminished-rhombicosidodecahedron.png
	modified:   src/images/thumbnails/octagonal-antiprism.png
	modified:   src/images/thumbnails/octagonal-prism.png
	modified:   src/images/thumbnails/octahedron.png
	modified:   src/images/thumbnails/parabiaugmented-dodecahedron.png
	modified:   src/images/thumbnails/parabiaugmented-hexagonal-prism.png
	modified:   src/images/thumbnails/parabiaugmented-truncated-dodecahedron.png
	modified:   src/images/thumbnails/parabidiminished-rhombicosidodecahedron.png
	modified:   src/images/thumbnails/parabigyrate-rhombicosidodecahedron.png
	modified:   src/images/thumbnails/paragyrate-diminished-rhombicosidodecahedron.png
	modified:   src/images/thumbnails/pentagonal-antiprism.png
	modified:   src/images/thumbnails/pentagonal-bipyramid.png
	modified:   src/images/thumbnails/pentagonal-cupola.png
	modified:   src/images/thumbnails/pentagonal-gyrobicupola.png
	modified:   src/images/thumbnails/pentagonal-gyrocupolarotunda.png
	modified:   src/images/thumbnails/pentagonal-orthobicupola.png
	modified:   src/images/thumbnails/pentagonal-orthobirotunda.png
	modified:   src/images/thumbnails/pentagonal-orthocupolarotunda.png
	modified:   src/images/thumbnails/pentagonal-prism.png
	modified:   src/images/thumbnails/pentagonal-pyramid.png
	modified:   src/images/thumbnails/pentagonal-rotunda.png
	modified:   src/images/thumbnails/rhombicosidodecahedron.png
	modified:   src/images/thumbnails/rhombicuboctahedron.png
	modified:   src/images/thumbnails/snub-cube.png
	modified:   src/images/thumbnails/snub-disphenoid.png
	modified:   src/images/thumbnails/snub-dodecahedron.png
	modified:   src/images/thumbnails/snub-square-antiprism.png
	modified:   src/images/thumbnails/sphenocorona.png
	modified:   src/images/thumbnails/sphenomegacorona.png
	modified:   src/images/thumbnails/square-antiprism.png
	modified:   src/images/thumbnails/square-cupola.png
	modified:   src/images/thumbnails/square-gyrobicupola.png
	modified:   src/images/thumbnails/square-orthobicupola.png
	modified:   src/images/thumbnails/square-pyramid.png
	modified:   src/images/thumbnails/tetrahedron.png
	modified:   src/images/thumbnails/triangular-bipyramid.png
	modified:   src/images/thumbnails/triangular-cupola.png
	modified:   src/images/thumbnails/triangular-hebesphenorotunda.png
	modified:   src/images/thumbnails/triangular-orthobicupola.png
	modified:   src/images/thumbnails/triangular-prism.png
	modified:   src/images/thumbnails/triaugmented-dodecahedron.png
	modified:   src/images/thumbnails/triaugmented-hexagonal-prism.png
	modified:   src/images/thumbnails/triaugmented-triangular-prism.png
	modified:   src/images/thumbnails/triaugmented-truncated-dodecahedron.png
	modified:   src/images/thumbnails/tridiminished-icosahedron.png
	modified:   src/images/thumbnails/tridiminished-rhombicosidodecahedron.png
	modified:   src/images/thumbnails/trigyrate-rhombicosidodecahedron.png
	modified:   src/images/thumbnails/truncated-cube.png
	modified:   src/images/thumbnails/truncated-cuboctahedron.png
	modified:   src/images/thumbnails/truncated-dodecahedron.png
	modified:   src/images/thumbnails/truncated-icosahedron.png
	modified:   src/images/thumbnails/truncated-icosidodecahedron.png
	modified:   src/images/thumbnails/truncated-octahedron.png
	modified:   src/images/thumbnails/truncated-tetrahedron.png

no changes added to commit (use "git add" and/or "git commit -a")

Seems to be related to Git LFS but I'm not sure what is going on. I'd like to open a PR but not add these image modifications if unnecessary. Is there a way around this issue, or should I just commit these changes along with my other changes?