$ git clone -n https://src.fedoraproject.org/rpms/python-gsd.git /var/lib/mock/f40-build-730816-103610/root/chroot_tmpdir/scmroot/python-gsd
Cloning into '/var/lib/mock/f40-build-730816-103610/root/chroot_tmpdir/scmroot/python-gsd'...
$ git fetch origin d89e2975df65a8e84b35bbbbbc4e17121b4bb29a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-gsd
 * [new ref]         d89e2975df65a8e84b35bbbbbc4e17121b4bb29a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d89e297 update to 3.1.1 (resolves rhbz#2216364)