$ git clone -n http://fedora.riscv.rocks:3000/rpms/R-rprintf.git /var/lib/mock/f41-build-840080-160507/root/chroot_tmpdir/scmroot/R-rprintf
Cloning into '/var/lib/mock/f41-build-840080-160507/root/chroot_tmpdir/scmroot/R-rprintf'...
$ git fetch origin 07ca18b7eedf0beeb53b4dd823bfcec425957633:KOJI_FETCH_HEAD
From http://fedora.riscv.rocks:3000/rpms/R-rprintf
 * [new ref]         07ca18b7eedf0beeb53b4dd823bfcec425957633 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 07ca18b Turn off bootstrap (riscv64)