Clarify precondition to working with wiki locally

Author: zachvalenta

content/communities/documenting-your-project-with-wikis/adding-or-editing-wiki-pages.md

@@ -52,7 +52,7 @@ Wikis are part of Git repositories, so you can make changes locally and push the
 ### Cloning wikis to your computer
 
 Every wiki provides an easy way to clone its contents down to your computer.
-You can clone the repository to your computer with the provided URL:
+Once you've created an initial page on {% data variables.product.product_name %}, you can clone the repository to your computer with the provided URL:
 
 ```shell
 $ git clone https://github.com/<em>YOUR_USERNAME</em>/<em>YOUR_REPOSITORY</em>.wiki.git