[Feature request] Give non-unique names to commits for grouping

Dear Git users,

I suggest that we should have the option to mark each commit with a category name, that is not necessarily unique (like 'tags') so we could have commit groups. For example we could: git mark {commit_id} {name}

Then we could give special functionality to some commands based on those "marks". For example if we had marked a few commits with the name 'fix_typo' git log --mark fix_typo. Show all the commits marked with 'fix_typo' git blame --mark fix_typo Run git blame but ignore commits with 'fix_typo'

Christos