Document how to avoid backlinks for references

content/get-started/writing-on-github/working-with-advanced-formatting/autolinked-references-and-urls.md

@@ -73,6 +73,11 @@ When referencing a commit from a private repository inside of a commit message,
 
 {% data reusables.repositories.autolink-references %}
 
+## Avoiding backlinks to linked references
+
+By default, references generate a backlink. For example, manually linking to an issue in a pull request will automatically generate another link from the issue *back* to the pull request.
+To avoid this behavior, you can use `redirect.github.com` instead of `github.com` when constructing the URL in your reference. If you do use a `redirect.github.com` URL in your reference link, no pop-up window will appear when hovering over it.
+
 ## Further reading
 
 * [AUTOTITLE](/get-started/writing-on-github/getting-started-with-writing-and-formatting-on-github/basic-writing-and-formatting-syntax)