$ git clone -n https://src.fedoraproject.org/rpms/R-gdtools.git /var/lib/mock/f38-build-side-42-init-devel-933422-28750/root/chroot_tmpdir/scmroot/R-gdtools
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-933422-28750/root/chroot_tmpdir/scmroot/R-gdtools'...
$ git fetch origin f82363c8567f272630b72566fb45e1e60b20b79b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-gdtools
 * [new ref]         f82363c8567f272630b72566fb45e1e60b20b79b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f82363c Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild