GitHub doc copy tweaks

Author: garethx

packages/homepage/content/docs/2-git.md

@@ -8,14 +8,13 @@ description:
 
 ## Base Concept
 
-With CodeSandbox you can import any GitHub repositories as a sandbox (this
+With CodeSandbox you can import any GitHub repository as a sandbox (this
 concept is described in more detail [here](/docs/importing#import-from-github)).
 An imported sandbox will automatically stay in sync with the GitHub repository;
 if you make a commit to GitHub it will reflect immediately in the sandbox.
 
 For that reason we've made GitHub sandboxes immutable, this means that you
-cannot make direct changes to the sandbox itself. However, you can still fork
-the sandbox. When you create a fork of a GitHub sandbox we will still keep a
+cannot make direct changes to the sandbox itself. They are treated as [templates](/docs/templates), so you can fork from them. When you create a fork of a GitHub sandbox we will still keep a
 reference to the original GitHub repository. This allows you to create commits
 and open pull requests from the forked sandboxes.
 
@@ -25,7 +24,7 @@ Anyone can import public GitHub repositories. You need a [Pro subscription](http
 
 You can see a forked sandbox of a GitHub sandbox as a separate branch. We still
 keep a reference to the original branch, and we also track the changes that
-happen. When you create a fork of the Git sandbox you will see a new panel in
+happen. When you create a fork of the GitHub sandbox you will see a new panel in
 the sidebar that looks like this:
 
 ![GitHub Sidebar](./images/github-sidebar.png)