Are Git forks actually Git clones?

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Fork, in the GitHub context, doesn’t extend Git.
It only allows clone on the server side.

When you clone a GitHub repository on your local workstation, you cannot contribute back to the upstream repository unless you are explicitly declared as “contributor”. That’s because your clone is a separate instance of that project. If you want to contribute to the project, you can use forking to do it, in the following way:

  • clone that GitHub repository on your GitHub account (that is the “fork” part, a clone on the server side)
  • contribute commits to that GitHub repository (it is in your own GitHub account, so you have every right to push to it)
  • signal any interesting contribution back to the original GitHub repository (that is the “pull request” part by way of the changes you made on your own GitHub repository)

Check also “Collaborative GitHub Workflow“.

If you want to keep a link with the original repository (also called upstream), you need to add a remote referring that original repository.
See “What is the difference between origin and upstream on GitHub?“

fork and upstream

And with Git 2.20 (Q4 2018) and more, fetching from fork is more efficient, with delta islands.

More Related Contents:

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  3. How to do a GitHub pull request
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