diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 8258b68841bb..cac56203e740 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -309,7 +309,8 @@ a pull request against the broken project. When you have opened a pull request,
 you can point the submodule at your pull request by calling
 
 ```
-git checkout pulls/$id_of_your_pr/head
+git fetch origin pull/$id_of_your_pr/head
+git checkout pull/$id_of_your_pr/head
 ```
 
 within the submodule's directory. Don't forget to also add your changes with