$ git clone -n https://src.fedoraproject.org/rpms/gshutdown.git /var/lib/mock/f45-build-13081-446/root/chroot_tmpdir/scmroot/gshutdown
Cloning into '/var/lib/mock/f45-build-13081-446/root/chroot_tmpdir/scmroot/gshutdown'...
$ git fetch origin a85655ff9ed2948a523392b967d263b4af84ce3f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gshutdown
 * [new ref]         a85655ff9ed2948a523392b967d263b4af84ce3f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a85655f Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild