This is the Dulwich project, ported to Python 3 (see: https://bugs.launchpad.net/dulwich/+bug/883315)

It aims to give an interface to git repos (both local and remote) that doesn't
call out to git directly but instead uses pure Python.

The project is named after the part of London that Mr. and Mrs. Git live in 
in the particular Monty Python sketch. It is based on the Python-Git module 
that James Westby <jw+debian@jameswestby.net> released in 2007 and now 
maintained by Jelmer Vernooij et al.

Please file bugs in the Dulwich project on Launchpad: 

https://bugs.launchpad.net/dulwich/+filebug

Basic documentation and tutorials can be found on Github:

http://eberle1080.github.com/dulwich-py3k/docs/index.html

Full API documentation can be found on Github:

http://eberle1080.github.com/dulwich-py3k/apidocs/index.html

Links

Mailing list: https://lists.launchpad.net/dulwich-users/maillist.html

Doc officielle: http://www.samba.org/~jelmer/dulwich/apidocs/dulwich.file.html