$ git clone -n https://gitee.com/fundawang/llvm.git /var/lib/mock/dist-an23-build-246503-63167/root/chroot_tmpdir/scmroot/llvm
Cloning into '/var/lib/mock/dist-an23-build-246503-63167/root/chroot_tmpdir/scmroot/llvm'...
$ git reset --hard b728f86df81830000c0b5dbd8c0fb8f4366dc814
HEAD is now at b728f86 16.0.0