$ git clone -n https://src.fedoraproject.org/rpms/tilix.git /var/lib/mock/f39-build-1853706-42375/root/chroot_tmpdir/scmroot/tilix
Cloning into '/var/lib/mock/f39-build-1853706-42375/root/chroot_tmpdir/scmroot/tilix'...
$ git fetch origin d741bd03dc6d6790397ebdc77238e402285ccc23:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/tilix
 * [new ref]         d741bd03dc6d6790397ebdc77238e402285ccc23 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d741bd0 Drop old terminix obsoletes