Fork a repository in Gist or Github in Github

 Sign in my GIthub account
Go to gist ( Gist is a simple way to share snippets and pastes with others)
 https://gist.github.com/jrmoran/3938567
at right top, click  fork
Now it is cloned to my account
https://gist.github.com/jiansenlu/9443876
Now in gist, click user name still in gist,. Switch back to Github,
click github  at the top right menu,
now back to github, click use name, now you can see you gitnub repository, not gist, for example
 https://github.com/jiansenlu
We can also fork a git hub (not gist) repository, for example
https://github.com/segmentio/metalsmith
click fork at right top, then it will be shown
https://github.com/jiansenlu/metalsmith

Note: it is shown  under repositories, not contribution