$ git clone -n https://src.fedoraproject.org/rpms/R-gh.git /var/lib/mock/f38-build-side-42-init-devel-689174-26792/root/chroot_tmpdir/scmroot/R-gh
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-689174-26792/root/chroot_tmpdir/scmroot/R-gh'...
$ git fetch origin e000bb57508804b5e5c5e39387010806004cd49f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-gh
 * [new ref]         e000bb57508804b5e5c5e39387010806004cd49f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e000bb5 Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild