$ git clone -n https://src.fedoraproject.org/rpms/R-rversions.git /var/lib/mock/f40-build-2257647-54327/root/chroot_tmpdir/scmroot/R-rversions
Cloning into '/var/lib/mock/f40-build-2257647-54327/root/chroot_tmpdir/scmroot/R-rversions'...
$ git fetch origin 9ea52bb99868dd261856e625c4c691f7063a22ac:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-rversions
 * [new ref]         9ea52bb99868dd261856e625c4c691f7063a22ac -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9ea52bb Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild