This has been a big security/UX issue with github for a while. It extends to the web interface: you can link to a specific commit under an official github repo

This has been a big security/UX issue with github for a while. It extends to the web interface: you can link to a specific commit under an official github repo but the contents of the README on the page will be from a malicious fork, which makes it way easier to make links look legitimate.