$ git clone -n https://gitee.com/fundawang/llvm.git /var/lib/mock/dist-an23-build-235459-62764/root/chroot_tmpdir/scmroot/llvm
Cloning into '/var/lib/mock/dist-an23-build-235459-62764/root/chroot_tmpdir/scmroot/llvm'...
$ git reset --hard 1b2d9073b02536d044cd7e9b735045e297c051f6
HEAD is now at 1b2d907 16.0.0