$ git clone -n http://fedora.riscv.rocks:3000/rpms/R-httpuv.git /var/lib/mock/f41-build-840159-160583/root/chroot_tmpdir/scmroot/R-httpuv
Cloning into '/var/lib/mock/f41-build-840159-160583/root/chroot_tmpdir/scmroot/R-httpuv'...
$ git fetch origin bc2cb6b585313aedd0707532b33e1e4b55e0b3e3:KOJI_FETCH_HEAD
From http://fedora.riscv.rocks:3000/rpms/R-httpuv
 * [new ref]         bc2cb6b585313aedd0707532b33e1e4b55e0b3e3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bc2cb6b Turn off bootstrap (riscv64)