$ git clone -n http://fedora.riscv.rocks:3000/rpms/R-rlang.git /var/lib/mock/f41-build-820989-152414/root/chroot_tmpdir/scmroot/R-rlang
Cloning into '/var/lib/mock/f41-build-820989-152414/root/chroot_tmpdir/scmroot/R-rlang'...
$ git fetch origin f606ccb33cd7b17e11f69dbebcb42ffd2450cc8b:KOJI_FETCH_HEAD
From http://fedora.riscv.rocks:3000/rpms/R-rlang
 * [new ref]         f606ccb33cd7b17e11f69dbebcb42ffd2450cc8b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f606ccb Bootstrap (riscv64)