What’s a knock-off of a knock-off called?

Yesterday, we reported about the Android smartphone that shipped with spyware pre-installed, Star N9500. It is a knock-off of the Samsung Galaxy S4. However, today, a reliable source tells me that the phone was not made by Star, but that it is a knock-off of a knock-off made by Star.

This is the question: What’s a knock-off of a knock-off called? A knock-off squared? You tell me.