$ git clone -n https://gitee.com/src-anolis-os/libcxx.git /var/lib/mock/dist-an23.2-build-433956-73078/root/chroot_tmpdir/scmroot/libcxx
Cloning into '/var/lib/mock/dist-an23.2-build-433956-73078/root/chroot_tmpdir/scmroot/libcxx'...
$ git fetch origin a23.2:KOJI_FETCH_HEAD
From https://gitee.com/src-anolis-os/libcxx
 * [new branch]      a23.2      -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 26a4506 16.0.6