Theme preview coming from Github before it gets published?

Hey all,

We’re planning on expanding our store to different markets and having theme developed using Github and synced for all changes to our stores simultaneously. However, I can’t find a way to have a preview of a theme if it comes from Github within Shopify before it gets published. Is that a limitation if theme comes from Github? I’m surprised no-one talks about this.

Our current workflow is once developer Imports a theme manually into our Shopify store we are able to test it/preview as it doesn’t get published right away, it sits under Themes section.