$ git clone -n https://src.fedoraproject.org/rpms/R-rlecuyer.git /var/lib/mock/f40-build-789213-135680/root/chroot_tmpdir/scmroot/R-rlecuyer
Cloning into '/var/lib/mock/f40-build-789213-135680/root/chroot_tmpdir/scmroot/R-rlecuyer'...
$ git fetch origin 684822456920d4eebf7486e57d76a8f345950b8a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-rlecuyer
 * [new ref]         684822456920d4eebf7486e57d76a8f345950b8a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6848224 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild