$ git clone -n https://gitee.com/mgb01105731/llvm_2.git /var/lib/mock/dist-an23.4-build-542344-85633/root/chroot_tmpdir/scmroot/llvm_2
Cloning into '/var/lib/mock/dist-an23.4-build-542344-85633/root/chroot_tmpdir/scmroot/llvm_2'...
$ git reset --hard origin/a23
HEAD is now at 0c82fb2 add libcxx into llvm