$ git clone -n https://gitee.com/happy_orange/llvm.git /var/lib/mock/dist-an23-build-86668-43240/root/chroot_tmpdir/scmroot/llvm
Cloning into '/var/lib/mock/dist-an23-build-86668-43240/root/chroot_tmpdir/scmroot/llvm'...
$ git reset --hard origin/a23
HEAD is now at 725511e add epoch in llvm