$ git clone -n https://gitee.com/fundawang/clang.git /var/lib/mock/dist-an23-build-265075-63988/root/chroot_tmpdir/scmroot/clang
Cloning into '/var/lib/mock/dist-an23-build-265075-63988/root/chroot_tmpdir/scmroot/clang'...
$ git reset --hard b7fc9d86e9d42bf6da036d15e03f9e587793e9ca
HEAD is now at b7fc9d8 More strict llvm version requirement on cmake-devel