Corrected the explanation for git fetch --all

Author: xitrox

content/cheat-sheet/_index.html

@@ -732,7 +732,7 @@ <h3>Fetch changes and then merge them into your current branch:</h3>
       <code>git pull</code>
     </div>
     <div class="item">
-      <h3>Fetch all branches:</h3>
+      <h3>Fetch all remotes:</h3>
       <code>git fetch --all</code>
     </div>
   </section>