$ git clone -n https://gitee.com/fundawang/libcxx.git /var/lib/mock/dist-an23-build-252510-63489/root/chroot_tmpdir/scmroot/libcxx
Cloning into '/var/lib/mock/dist-an23-build-252510-63489/root/chroot_tmpdir/scmroot/libcxx'...
$ git reset --hard 8f9b35697935ca7305868f085bb4c0448228734f
HEAD is now at 8f9b356 16.0.1