$ git clone -n https://gitee.com/fundawang/llvm.git /var/lib/mock/dist-an23-build-255485-63653/root/chroot_tmpdir/scmroot/llvm
Cloning into '/var/lib/mock/dist-an23-build-255485-63653/root/chroot_tmpdir/scmroot/llvm'...
$ git reset --hard 6a4ecf1921dad71c8e3a2dfb9b646d1ad2a77a69
HEAD is now at 6a4ecf1 16.0.2