title: Getting an Git related Error when trying to build or serve with new theme
body: <p><strong>Description:</strong></p>
  
  <p>For some reason, I can't build or serve my jekyll site without "configuring a repo name". I have no clue why there would be a repo name needed for a local build or how to add the repo name.</p>
  
  <p>This is the first time this happened. I tried to migrate the default site from "minima" to "jekyll-theme-primer". When I fired it up in minima it outputted me the default side. I migrated the default post, index.md and about to layout default. It does not fire up and throws me this error. Can somebody specify how to move on from here?</p>
  
  <p><strong>Input:</strong></p>
  
  <pre><code>jekyll -v: jekyll 3.7.2
  </code></pre>
  
  <p><strong>Expected behaviour:</strong></p>
  
  <pre><code>Tobiass-MBP:tobi.codes Tobias$ bundle exec jekyll serve
  Configuration file: /Users/Tobias/Jekyll Blog/tobi.codes/_config.yml
              Source:  /Users/Tobias/Jekyll Blog/tobi.codes/
         Destination:  /Users/Tobias/Jekyll Blog/tobi.codes/_site
   Incremental build: disabled. Enable with --incremental
        Generating... 
                      done in 0.62 seconds.
   Auto-regeneration: enabled for ' /Users/Tobias/Jekyll Blog/tobi.codes/'
      Server address: http://127.0.0.1:4000/
    Server running... press ctrl-c to stop.
  </code></pre>
  
  <p><strong>Actual behaviour:</strong></p>
  
  <pre><code>Tobiass-MBP:tobi.codes Tobias$ bundle exec jekyll serve
  Configuration file: /Users/Tobias/Jekyll Blog/tobi.codes/_config.yml
              Source: /Users/Tobias/Jekyll Blog/tobi.codes
         Destination: /Users/Tobias/Jekyll Blog/tobi.codes/_site
   Incremental build: disabled. Enable with --incremental
        Generating... 
  fatal: Not a git repository (or any of the parent directories): .git
  fatal: Not a git repository (or any of the parent directories): .git
    Liquid Exception: No repo name found. Specify using PAGES_REPO_NWO environment variables, 'repository' in your configuration, or set up an 'origin' git remote pointing to your github.com repository. in /_layouts/default.html
               ERROR: YOUR SITE COULD NOT BE BUILT:
                      ------------------------------------
                      No repo name found. Specify using PAGES_REPO_NWO environment variables, 'repository' in your configuration, or set up an 'origin' git remote pointing to your github.com repository.
  </code></pre>