You don't have to do a thing. Microsoft (and Amazon, with it's CodeWhisperer, and every other similar business building such services) went into this fight with their eyes wide open. They knew this would happen and are well prepared for it. And even among the FSF's own invited whitepapers on CoPilot (https://www.fsf.org/news/publication-of-the-fsf-funded-white...) was one ("Copyright implications of the use of code repositories to train a machine learning model") that that seemed to conclude that CoPilot-like services could defensibly say that copyright was not violated regardless of the license.

So if this suit succeeded, I would be very surprised. Even the FSF isn't rushing to file suit and they care about this controversy probably more than anyone.