$ git clone -n https://src.fedoraproject.org/rpms/R-modelr.git /var/lib/mock/f39-build-1570240-37754/root/chroot_tmpdir/scmroot/R-modelr
Cloning into '/var/lib/mock/f39-build-1570240-37754/root/chroot_tmpdir/scmroot/R-modelr'...
$ git fetch origin 82fcd59f16b8fea878059139ff0b4c9a898dfc7b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-modelr
 * [new ref]         82fcd59f16b8fea878059139ff0b4c9a898dfc7b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 82fcd59 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild