Have you ever looked at a commit page on GitHub and wondered what branch the commit was in? We did too.
If the commit is not on the default branch, the indicator will show the branches which contain the commit. If the commit is part of an unmerged pull request, a link will be shown.
Once the commit makes it to the default branch, any tags that contain the commit will be shown, and the default branch will be the only branch listed.
Enjoy the additional commit context!