$ git clone -n https://src.fedoraproject.org/rpms/lxsession.git /var/lib/mock/f41-build-841120-161064/root/chroot_tmpdir/scmroot/lxsession
Cloning into '/var/lib/mock/f41-build-841120-161064/root/chroot_tmpdir/scmroot/lxsession'...
$ git fetch origin ceaaf2df28c3155997655815e9fb31ab8ef6f7a8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/lxsession
 * [new ref]         ceaaf2df28c3155997655815e9fb31ab8ef6f7a8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ceaaf2d Update to the latest git