http://help.github.com/fork-a-repo/






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What if you want to work on a project with someone else on github?
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So let's say you want to collaborate with someone on github. No worries, github makes that easy.

1) Fork a repo onto your github account

First thing's first, navigate to the project you'd like to collaborate on, and click the fork button (someone else must own the project).


2) Make a change that you think is swell

Just change some code... You could even do it from the html interface now.


3) Issue a pull request

You can now click the "pull request" button on your project page. The other party will be alerted that you have made a swell change to the project. They can then choose to either accept the change, or ignore it in the case that the change isn't swell enough.





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What if the other guy makes a change to his project after I've forked it?
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"Don't sweat it, this is no problem at all"

1) Fetch the upstream changes and merge them (you need to work with things on a local machine, so set that up first)

$  git remote add upstream git://github.com/octocat/Spoon-Knife.git

$  git fetch upstream

$  git merge upstream/master

If you have problems, remember that git stash is your friend. (TODO: add link to git stash)