Here are a few helpful links to documentaion, videos, and tutorials to help you get started with Engine Source & GitHub in Unreal Engine 4.
DOCUMENTATION:
- [Programming Guide](https://docs.unrealengine.com/latest/INT/Programming/index.html)
- [Unreal Engine API](https://docs.unrealengine.com/latest/INT/API/index.html)
TUTORIALS:
Videos
- [Introduction to UE4 on GitHub (Downloading and Building UE4 Source)](https://www.youtube.com/watch?v=usjlNHPn-jo&index=1&list=PLZlv_N0_O1gYGXhsKo6NsvwR6f2IwSggZ)
Wiki Tutorials
- [Basic Tutorial for Getting Started with GitHub and Building UE4 Source](https://wiki.unrealengine.com/GitHub_Setup)
TWITCH STREAMS:
- [Github](http://www.twitch.tv/unrealengine/b/590246248)
ADDITIONAL RESOURCES:
- [Ben Marsh's GitHub Dependency Zips and Latest Preview Snapshots](https://forums.unrealengine.com/showthread.php?51998-GitHub-dependency-zips-and-latest-preview-snapshots)
- [GitHub Sharing Hub](https://wiki.unrealengine.com/GitHub_Sharing_Hub)
If there is some specific information related to engine source that you feel is missing from our documentation or tutorials, please let us know by creating a post in the Feedback section. Thanks!