Earlier quoted context omitted.
In Github terms of service, if you make a repo public, others are free to view and fork it, apparently even if you place a commercial license on it, or no license. The lawyers will have to figure out if that means copy, use or whatever. https://help.github.com/en/articles/licensing-a-repository
I believe this is a big problem with git or any of the current repo gui providers. A repository should not be able to be forked if it doesn't have a SPDIX license. Or at the very least users should be able to turn off forking ability in the repo settings. It's usually not an issue but I have run into some small repositories that had no license, meaning I could -not- fork and modify for myself or a PR, legally. But th…
Unless you want to pay thousands of dollars per repo presumably everyone is going to continue not giving a damn.
If you don't want people to clone a repo don't upload it to a public github repo. If you are thinking of cloning realize that the ability to clone it gives you zero legal rights.
Anyway you cannot fix legal complexities with technology in this instance.