I disagree, without this info, I can't easily tell if any commit is part of a feature or is a simple hotfix. I need to rely on the commiter to include the info in the commit message, which is almost always not the case.
It's worse than that: the branch name is lost after a merge. That "merge branch xyz" is simply the default commit message. So it doesn't matter what you do, commit messages are all you have!
