$ git clone -n https://src.fedoraproject.org/rpms/groonga.git /var/lib/mock/f39-build-1544018-36606/root/chroot_tmpdir/scmroot/groonga
Cloning into '/var/lib/mock/f39-build-1544018-36606/root/chroot_tmpdir/scmroot/groonga'...
$ git fetch origin 3a28c6b1eb5a3458d4139c9243e960caee94cf43:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/groonga
 * [new ref]         3a28c6b1eb5a3458d4139c9243e960caee94cf43 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3a28c6b Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild