Line #1: 80 chars, Line #2: 35 chars, Line #3: 78 chars. I'd go for something like:
* Repository: Folder containing files of source code for programs, anyone can edit
* Forked: A copy of another repository
* Pull Request: Ask for included changes to be added to original file
Folders, files, programs and source code are concepts almost any computer user would understand, although it is not entirely accurate, the constraints aren't good. Took liberties with "anyone can edit", maybe "people can edit" would be more accurate.
* Repository: Folder containing files of source code for programs, anyone can edit
* Forked: A copy of another repository
* Pull Request: Ask for included changes to be added to original file
Folders, files, programs and source code are concepts almost any computer user would understand, although it is not entirely accurate, the constraints aren't good. Took liberties with "anyone can edit", maybe "people can edit" would be more accurate.