I want to import content
In time Drupal will have Drupal 8 -> Drupal 8 migration, but it will be a while since migration from D6 and D7 is more important. Right now there aren't any easy solutions for this.

The most sound solution would be to create a service on the beta site that exposes the data on the beta site and create a script that fetches this.

You can use RELAXed Web Services to help creating webservice on the beta site.