$ git clone -n https://src.fedoraproject.org/rpms/python-empy.git /var/lib/mock/f45-build-30516-646/root/chroot_tmpdir/scmroot/python-empy
Cloning into '/var/lib/mock/f45-build-30516-646/root/chroot_tmpdir/scmroot/python-empy'...
$ git fetch origin 96f13fcea438d1ddf320630f82e62c01651acb6e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-empy
 * [new ref]         96f13fcea438d1ddf320630f82e62c01651acb6e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 96f13fc Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild