Forking Git repository from GitHub to GitLab

If you just want to track changes, first make an empty repository in GitLab (or whatever else you may be using) and clone it to your computer.

Then add the GitHub project as the "upstream" remote with:

git remote add upstream https://github.com/user/repo

Now you can fetch and pull from the upstream should there be any changes. (You can also push or merge to it if you have access rights.)

git pull upstream master

Finally, push back to your own GitLab repository:

git push origin master

If you don't want to manually pull upstream/push origin, GitLab offers a mirroring ability in Settings => Repository => Mirroring repositories.

The browser-only way:

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