This is exactly the problem, unfortunately.
For somebody who knows a bit how things are set up, or is willing to spend 10 minutes researching, it's a no-brainer that you can just "git clone" entire linux kernel development history, or download entire wikipedia [0].
Alas, large number of scrapers are not willing to spend those 10 minutes, it would appear. So, here we are.
You can tell Claude to clone from github for Linux stuff all you want... it's still going to try web, and fail, before doing what you asked it to do.