$ git clone -n https://src.fedoraproject.org/rpms/booth.git /var/lib/mock/f41-build-1034386-18630/root/chroot_tmpdir/scmroot/booth
Cloning into '/var/lib/mock/f41-build-1034386-18630/root/chroot_tmpdir/scmroot/booth'...
$ git fetch origin 10f558600c515975a487d1f24b64cd7f070a6890:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/booth
 * [new ref]         10f558600c515975a487d1f24b64cd7f070a6890 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 10f5586 Remove include_unit_test leftover