$ git clone -n https://src.fedoraproject.org/rpms/tachyon.git /var/lib/mock/f40-build-2528413-61827/root/chroot_tmpdir/scmroot/tachyon
Cloning into '/var/lib/mock/f40-build-2528413-61827/root/chroot_tmpdir/scmroot/tachyon'...
$ git fetch origin af53181c617602ed27577549616d3c89cf43e443:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/tachyon
 * [new ref]         af53181c617602ed27577549616d3c89cf43e443 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at af53181 Orphaned for 6+ weeks