$ git clone -n https://src.fedoraproject.org/rpms/python-cram.git /var/lib/mock/f45-build-30154-643/root/chroot_tmpdir/scmroot/python-cram
Cloning into '/var/lib/mock/f45-build-30154-643/root/chroot_tmpdir/scmroot/python-cram'...
$ git fetch origin b17f4c7c2a28bd0597fb4bb7f6e6d91080192b3d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-cram
 * [new ref]         b17f4c7c2a28bd0597fb4bb7f6e6d91080192b3d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b17f4c7 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild