$ git clone -n http://fedora.riscv.rocks:3000/rpms/R-rlang.git /var/lib/mock/f41-build-838484-159735/root/chroot_tmpdir/scmroot/R-rlang
Cloning into '/var/lib/mock/f41-build-838484-159735/root/chroot_tmpdir/scmroot/R-rlang'...
$ git fetch origin ffa2e693f9bab6a151ee464e5bed0a44c70ff094:KOJI_FETCH_HEAD
From http://fedora.riscv.rocks:3000/rpms/R-rlang
 * [new ref]         ffa2e693f9bab6a151ee464e5bed0a44c70ff094 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ffa2e69 enable bootstrap