@b0rk @stsp As far as I understand, author and committer are mostly relevant for projects, where change requests are approved and finally added by maintainers.
"The author is the person who originally wrote the work, whereas the committer is the person who last applied the work. So, if you send in a patch to a project and one of the core members applies the patch, both of you get credit — you as the author, and the core member as the committer."
https://git-scm.com/book/en/v2/Git-Basics-Viewing-the-Commit-History