$ git clone -n http://fedora.riscv.rocks:3000/rpms/llvm15.git /var/lib/mock/f42-build-864446-172313/root/chroot_tmpdir/scmroot/llvm15
Cloning into '/var/lib/mock/f42-build-864446-172313/root/chroot_tmpdir/scmroot/llvm15'...
$ git fetch origin dcd2cc03a2062c91eed6926ca4ae05a2f2173db0:KOJI_FETCH_HEAD
From http://fedora.riscv.rocks:3000/rpms/llvm15
 * [new ref]         dcd2cc03a2062c91eed6926ca4ae05a2f2173db0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dcd2cc0 Add support for riscv64