A quick search returned this FAQ: Github Integration How to Add and Update from Repositories. Might be helpful as a general guide.
You’ll need 3 pieces of information to add a repository to your SmartThings IDE: owner, (repository) name, branch. When you see a link to a github file, it’s usually in the following structure:
https://github.com/<owner>/<repo_name>/blob/<branch>/...
I’ll also update my original post to make it more explicit. Hope this helps.