$ git clone -n https://src.fedoraproject.org/rpms/klettres.git /var/lib/mock/f40-build-2056744-49124/root/chroot_tmpdir/scmroot/klettres
Cloning into '/var/lib/mock/f40-build-2056744-49124/root/chroot_tmpdir/scmroot/klettres'...
$ git fetch origin 6b8a6ab56530c57332e22058af82cb1e9adff4b4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/klettres
 * [new ref]         6b8a6ab56530c57332e22058af82cb1e9adff4b4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6b8a6ab 24.01.80