1) You could potentially use a DMCA claim to take down the repo, if there has been a license violation. But:
2) This is not plagiarism. You put the code under a license that says almost-literally "do anything you want with this code", and they did. There is no legal obligation to use pull requests instead of forks.
> What would you do if this happens with your project?
Probably ignore it. If your version is better, people will use it instead. If it isn't, that's life.
1) You could potentially use a DMCA claim to take down the repo, if there has been a license violation. But:
2) This is not plagiarism. You put the code under a license that says almost-literally "do anything you want with this code", and they did. There is no legal obligation to use pull requests instead of forks.
> What would you do if this happens with your project?
Probably ignore it. If your version is better, people will use it instead. If it isn't, that's life.