$ git clone -n http://fedora.riscv.rocks:3000/rpms/R-later.git /var/lib/mock/f41-build-839056-159980/root/chroot_tmpdir/scmroot/R-later
Cloning into '/var/lib/mock/f41-build-839056-159980/root/chroot_tmpdir/scmroot/R-later'...
$ git fetch origin d0508cc36f636793cb497db4181efcfb03482e31:KOJI_FETCH_HEAD
From http://fedora.riscv.rocks:3000/rpms/R-later
 * [new ref]         d0508cc36f636793cb497db4181efcfb03482e31 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d0508cc disable tests to bootstrap testthat