$ git clone -n https://src.fedoraproject.org/rpms/systemd.git /var/lib/mock/f41-build-1283660-23209/root/chroot_tmpdir/scmroot/systemd
Cloning into '/var/lib/mock/f41-build-1283660-23209/root/chroot_tmpdir/scmroot/systemd'...
$ git fetch origin 8153d9b0f978d633c8422011d4c547ae1f0e51a4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/systemd
 * [new ref]         8153d9b0f978d633c8422011d4c547ae1f0e51a4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8153d9b Revert "Remove tmpfiles snippet for /home and /srv"