$ git clone -n https://gitee.com/guost123/llvm.git /var/lib/mock/dist-an23.3-build-431518-73055/root/chroot_tmpdir/scmroot/llvm
Cloning into '/var/lib/mock/dist-an23.3-build-431518-73055/root/chroot_tmpdir/scmroot/llvm'...
$ git fetch origin 52b77fd4480a976c91a5c33811c68dc806ccc648:KOJI_FETCH_HEAD
From https://gitee.com/guost123/llvm
 * [new ref]         52b77fd4480a976c91a5c33811c68dc806ccc648 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 52b77fd adapt for riscv64