$ git clone -n https://src.fedoraproject.org/rpms/mate-system-monitor.git /var/lib/mock/f40-build-790646-136628/root/chroot_tmpdir/scmroot/mate-system-monitor
Cloning into '/var/lib/mock/f40-build-790646-136628/root/chroot_tmpdir/scmroot/mate-system-monitor'...
$ git fetch origin cdcd95b15311491b807438525a49e1263ba38597:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mate-system-monitor
 * [new ref]         cdcd95b15311491b807438525a49e1263ba38597 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cdcd95b update to 1.28.1