$ git clone -n https://src.fedoraproject.org/rpms/mesa.git /var/lib/mock/f39-build-2329175-58877/root/chroot_tmpdir/scmroot/mesa
Cloning into '/var/lib/mock/f39-build-2329175-58877/root/chroot_tmpdir/scmroot/mesa'...
$ git fetch origin 60f5076f717e8b6a022ad081a4e5384b64b05ab9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mesa
 * [new ref]         60f5076f717e8b6a022ad081a4e5384b64b05ab9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 60f5076 Update to 23.3.4