So Github has decided to make Finer-grained OAuth scopes for SSH keys.
Generally, it is a great idea, but not really backwards incompatible. The Github OAuth tokens previously generated by DevAssistant will no longer work, since they don’t have the correct scope. And guess what, there is no way to change the scope when authenticating via an OAuth token.
To make long story short, all tokens previously generated by DevAssistant are broken. The recommended approach is to delete “github user” and “github token” entries in your ~/.gitconfig to be able to generate new ones (when you get DevAssistant build that fixes this bug).
We have a patch that makes DevAssistant work with the new scopes – it’s upstream and we also backported it to Fedora 20 DevAssistant build. We’re not planning to release maintenance 0.8.1 with this fix, unless some people actually ask us to (do ask us if you really want this!).