$ git clone -n https://src.fedoraproject.org/rpms/R-repr.git /var/lib/mock/f38-build-side-42-init-devel-748329-27661/root/chroot_tmpdir/scmroot/R-repr
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-748329-27661/root/chroot_tmpdir/scmroot/R-repr'...
$ git fetch origin e0715cba4b5879f51723e191fb9ce4c4145d7f5d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-repr
 * [new ref]         e0715cba4b5879f51723e191fb9ce4c4145d7f5d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e0715cb Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild