I've been using git happily for many years. Strangely enough the provenance of a commit i.e. which branch did a commit originally come has not really mattered to me very much. Mercurial provides this and they are using `git notes` to add this provenance meta-data to each commit during migration to git.

I would have thought I'd need this much more, but I have not. In plain git I'll just `git log` and grep for the commit in case I want to make sure a commit is available in a certain branch.