$ git clone -n http://fedora.riscv.rocks:3000/rpms/clang.git /var/lib/mock/f40-build-799492-142438/root/chroot_tmpdir/scmroot/clang
Cloning into '/var/lib/mock/f40-build-799492-142438/root/chroot_tmpdir/scmroot/clang'...
$ git fetch origin 530d8ffdcca43bdcf6253368a76e11303ca169c0:KOJI_FETCH_HEAD
From http://fedora.riscv.rocks:3000/rpms/clang
 * [new ref]         530d8ffdcca43bdcf6253368a76e11303ca169c0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 530d8ff Allow vendor (redhat) triplet for riscv64