For a sketch w/ assets, like images, audios, videos, fonts, etc., you can create a repo for it at GitHub.com:
Quickstart for repositories - GitHub Docs
And then drag & drop your whole sketch folder into it:
For a sketch w/ assets, like images, audios, videos, fonts, etc., you can create a repo for it at GitHub.com:
Quickstart for repositories - GitHub Docs
And then drag & drop your whole sketch folder into it: