$ git clone -n https://gitee.com/fundawang/llvm.git /var/lib/mock/dist-an23-build-246814-63193/root/chroot_tmpdir/scmroot/llvm
Cloning into '/var/lib/mock/dist-an23-build-246814-63193/root/chroot_tmpdir/scmroot/llvm'...
$ git reset --hard cfd284200e32da0354878a081aedbc409885d975
HEAD is now at cfd2842 16.0.0