It would be nice if GitHub published a list of shortcut keys for their desktop apps but since they don't, here's what works as of 2017-04-24.
`- (backtick) open shell (aliasctrl+shift+~for when you are in a text field)a- add repob- branchesn- new brancht- toolsalt+s- sync branchctrl+tab- switch between changes and historyF5- refresh all git data
Help wanted. If you have discovered new information about shortcut keys for GitHub desktop, please fork, change, and submit a pull request.