$ git clone -n https://src.fedoraproject.org/rpms/R-S4Vectors.git /var/lib/mock/f39-build-1536736-36340/root/chroot_tmpdir/scmroot/R-S4Vectors
Cloning into '/var/lib/mock/f39-build-1536736-36340/root/chroot_tmpdir/scmroot/R-S4Vectors'...
$ git fetch origin 9be59caa90c37cc5edc43342d7e6d3757a7fa27e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-S4Vectors
 * [new ref]         9be59caa90c37cc5edc43342d7e6d3757a7fa27e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9be59ca Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild