Enhance instructions for checking out pull requests locally

Clarify instructions for fetching a pull request reference and creating a local branch.

Author: maxhild

content/pull-requests/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally.md

@@ -65,11 +65,15 @@ Anyone can work with a previously opened pull request to continue working on it,
    ![Screenshot of the title of a pull request. The pull request's ID number is outlined in dark orange.](/assets/images/help/pull_requests/pull-request-id-number.png)
 
 {% data reusables.command_line.open_the_multi_os_terminal %}
-1. Fetch the reference to the pull request based on its ID number, creating a new branch in the process.
+1. Fetch the reference to the pull request based on its ID number, creating a new branch in the process. Use the pull request ID and the name of the local branch you want to create in the command.
 
    ```shell
    git fetch origin pull/ID/head:BRANCH_NAME
    ```
+   For pull request #123, creating a local branch named `test_branch`, this would become:
+   ```shell
+   git fetch origin pull/123/head:test_branch
+   ```
 
 1. Switch to the new branch that's based on this pull request: