Not a supporter of Copilot, but I think it's pretty easy to access the same data through BigQuery:

>The Google BigQuery Public Datasets program now offers a full snapshot of the content of more than 2.8 million open source GitHub repositories in BigQuery. Thanks to our new collaboration with GitHub, you'll have access to analyze the source code of almost 2 billion files with a simple (or complex) SQL query.

https://cloud.google.com/blog/topics/public-datasets/github-...