$ git clone -n https://gitee.com/fundawang/llvm.git /var/lib/mock/dist-an23-build-246509-63169/root/chroot_tmpdir/scmroot/llvm
Cloning into '/var/lib/mock/dist-an23-build-246509-63169/root/chroot_tmpdir/scmroot/llvm'...
$ git reset --hard ef069e885fa5c65c008d19de20da5835eed17bde
HEAD is now at ef069e8 16.0.0