$ git clone -n http://fedora.riscv.rocks:3000/rpms/R-desc.git /var/lib/mock/f41-build-840052-160507/root/chroot_tmpdir/scmroot/R-desc
Cloning into '/var/lib/mock/f41-build-840052-160507/root/chroot_tmpdir/scmroot/R-desc'...
$ git fetch origin e9c7f5cc6aff399712fdb57b26b47a71ef92d230:KOJI_FETCH_HEAD
From http://fedora.riscv.rocks:3000/rpms/R-desc
 * [new ref]         e9c7f5cc6aff399712fdb57b26b47a71ef92d230 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e9c7f5c Turn off bootstrap (riscv64)