$ git clone -n https://src.fedoraproject.org/rpms/rocs.git /var/lib/mock/f40-build-2257529-54325/root/chroot_tmpdir/scmroot/rocs
Cloning into '/var/lib/mock/f40-build-2257529-54325/root/chroot_tmpdir/scmroot/rocs'...
$ git fetch origin 26bf79c29455975a801bf32fbe8fb45a6c2036f4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rocs
 * [new ref]         26bf79c29455975a801bf32fbe8fb45a6c2036f4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 26bf79c 24.01.90