$ git clone -n https://src.fedoraproject.org/rpms/R-cellranger.git /var/lib/mock/f40-build-2142999-50851/root/chroot_tmpdir/scmroot/R-cellranger
Cloning into '/var/lib/mock/f40-build-2142999-50851/root/chroot_tmpdir/scmroot/R-cellranger'...
$ git fetch origin 1a4506b17586da331625c4466a6839d400bd0a3e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-cellranger
 * [new ref]         1a4506b17586da331625c4466a6839d400bd0a3e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1a4506b Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild