$ git clone -n https://gitee.com/chen_yu_ao/libcxx /var/lib/mock/dist-an23-build-209072-61857/root/chroot_tmpdir/scmroot/libcxx
Cloning into '/var/lib/mock/dist-an23-build-209072-61857/root/chroot_tmpdir/scmroot/libcxx'...
$ git reset --hard 7567c69e89d2e1d16e5b6fad5df8c9342677f826
HEAD is now at 7567c69 Init package from upstream