$ git clone -n https://gitee.com/fundawang/llvm.git /var/lib/mock/dist-an23-build-194374-60852/root/chroot_tmpdir/scmroot/llvm
Cloning into '/var/lib/mock/dist-an23-build-194374-60852/root/chroot_tmpdir/scmroot/llvm'...
$ git reset --hard 75c144878a16076007acb8856dfaeb49c810ad6b
HEAD is now at 75c1448 15.0.6