$ git clone -n http://fedora.riscv.rocks:3000/rpms/llvm.git /var/lib/mock/f42-build-864908-172636/root/chroot_tmpdir/scmroot/llvm
Cloning into '/var/lib/mock/f42-build-864908-172636/root/chroot_tmpdir/scmroot/llvm'...
$ git fetch origin b5561888c8ea55ddcd124718ece4e6ab6dc2102a:KOJI_FETCH_HEAD
From http://fedora.riscv.rocks:3000/rpms/llvm
 * [new ref]         b5561888c8ea55ddcd124718ece4e6ab6dc2102a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b556188 riscv64 support