How to create a copy of the existing repository for test purposes (without forking)

1. Create a new GitHub repository
2. Open the local project it in the terminal
3. git remote add test <URL_TO_GITHUB>
4. git push test <branch_name>
5. Then stage a commit, push it with git push test <branch_name>, but don’t push anything to origin
6. Sometimes force push is needed: git push test <branch_name> --force

https://stackoverflow.com/questions/5181845/git-push-existing-repo-to-a-new-and-different-remote-repo-server