Add commit message of latest commit to ScmPosition

[gabrieljones]

I would like to consider the trailers in the commit message of the HEAD commit in my versionCreator lambda.

[gabrieljones]

Maybe while we are at it we should add all the rest of the commit headers, the standard headers as well as the extra headers if any. https://github.com/git/git/blob/v2.33.0/commit.c#L1299-L1320

[bgalek]

I think it's a cool idea ;)

[bgalek]

@gabrieljones do You want to make PR? :)

[vladimirfx]

Can it be fetchet with configurable deph of commits? This is solves https://github.com/allegro/axion-release-plugin/issues/497