> This branch is up to date with git/git:master.

Is there anything to see here? There are 28.1k forks of git on Github. It's a normal thing to do when making pull requests.

(Does git accept pull requests, though?)

The git repo on github is a publish-only copy. It doesn't accept pull requests, though apparently there is a mechanism to turn pull requests into a patch for the mailing list they may accept.