If buildhistory-diff can't import GitPython it prints the following error message: "Please install GitPython (python-git) 0.3.1 or later in order to use this script" We need to update this message to report a Python3 version of GitPython
Looks like 0.3.4 add Python3 support: http://gitpython.readthedocs.io/en/stable/changes.html#python-3-support
Fix has been sent for review: http://lists.openembedded.org/pipermail/openembedded-core/2016-June/122668.html
Fixing status
The fix has been merged to master: https://git.yoctoproject.org/cgit/cgit.cgi/poky/commit/?id=b2b1a5fa46d889ac143be79a785eacd053f9e629