$ git clone -n https://src.fedoraproject.org/rpms/mate-system-monitor.git /var/lib/mock/f45-build-18085-508/root/chroot_tmpdir/scmroot/mate-system-monitor
Cloning into '/var/lib/mock/f45-build-18085-508/root/chroot_tmpdir/scmroot/mate-system-monitor'...
$ git fetch origin 6620eefcda68eb8432bc56d3bd1232ab9a03ba36:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mate-system-monitor
 * [new ref]         6620eefcda68eb8432bc56d3bd1232ab9a03ba36 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6620eef Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild