Fixed `TypeError` when commit is being null.

[AyushAgnihotri2025]

Closes #463 Closes #425

[willnaoosmith]

Merging when?

[pseusys]

I personally can't merge the PR until the CI workflow runs successfully and I also can't launch the workflow. I think, it should be triggered on push. @AyushAgnihotri2025, @willnaoosmith, could you please make sure the workflow runs successfully and, if not, investigate logs and fix errors?

P.S. also, if it's not a big deal, I would prefer if commit is not None: syntax as it is more explicit and clear.

[willnaoosmith]

@pseusys it finally did run correctly again! @AyushAgnihotri2025 Thanks for the help!