$ git clone -n https://src.fedoraproject.org/rpms/python-dulwich.git /var/lib/mock/f31-build-51137-27490/root/chroot_tmpdir/scmroot/python-dulwich
Cloning into '/var/lib/mock/f31-build-51137-27490/root/chroot_tmpdir/scmroot/python-dulwich'...
$ git reset --hard aaf927c54f9a7634b3e4f10af9b2f046fac48a36
HEAD is now at aaf927c Rebuild after removing python2-sphinx