fork in github

GitHub fork
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A fork is a copy of a repository. Forking a repository allows you to freely experiment with changes without affecting the original project. Most commonly, forks are used to either propose changes to someone else's project or to use someone else's project as a starting point for your own idea.

Creating a “fork” is producing a personal copy of someone else's project. 
Forks act as a sort of bridge between the original repository and your 
personal copy. You can submit Pull Requests to help make other people's 
projects better by offering your changes up to the original project.

$ git clone https://hostname/YOUR-USERNAME/Spoon-Knife

$ git remote -v
> origin  https://hostname/YOUR_USERNAME/YOUR_FORK.git (fetch)
> origin  https://hostname/YOUR_USERNAME/YOUR_FORK.git (push)

$ git clone https://hostname/YOUR-USERNAME/Spoon-Knife
> Cloning into `Spoon-Knife`...
> remote: Counting objects: 10, done.
> remote: Compressing objects: 100% (8/8), done.
> remove: Total 10 (delta 1), reused 10 (delta 1)
> Unpacking objects: 100% (10/10), done.