GitHub allows you to create a remote copy of another remote repo, called forking.
A fork is a copy of a remote repository created on the same hosting service such as GitHub, GitLab, or Bitbucket. On GitHub, you can fork a repository from another user or organisation into your own space (i.e., your user account or an organisation you have sufficient access to). Forking is particularly useful if you want to experiment with a repo but don’t have write permissions to the original -- you can fork it and work on your own remote copy without affecting the original repository.
0 Create a GitHub account if you don't have one yet.
1 Go to the GitHub repo you want to fork e.g., samplerepo-things
2 Click on the 
button in the top-right corner. In the next step,
- choose to fork to your own account or to another GitHub organization that you are an admin of.
- un-tick the
[ ] Copy the master branch onlyoption, so that you get copies of other branches (if any) in the repo.
Forking is not a Git feature, but a feature provided by hosted Git services like GitHub, GitLab, or Bitbucket.
GitHub does not allow you to fork the same repo more than once to the same destination. If you want to re-fork, you need to delete the previous fork.