Merge branch 'update-docu-repository-mirroring' into 'master'

Describe how to set up a push mirror repository at GitLab

Closes #57062

See merge request gitlab-org/gitlab-ce!24834

doc/workflow/repository_mirroring.md

@@ -88,6 +88,14 @@ The mirrored repository will be listed. For example, `https://*****:*****@github
 
 The repository will push soon. To force a push, click the appropriate button.
 
+## Setting up a push mirror to another GitLab instance with 2FA activated
+
+1. On the destination GitLab instance, create a [personal access token](../user/profile/personal_access_tokens.md) with `API` scope.
+1. On the source GitLab instance:
+    1. Fill in the **Git repository URL** field using this format: `https://oauth2@<destination host>/<your_gitlab_group_or_name>/<your_gitlab_project>.git`.
+    1. Fill in **Password** field with the GitLab personal access token created on the destination GitLab instance.
+    1. Click the **Mirror repository** button.
+
 ## Pulling from a remote repository **[STARTER]**
 
 > [Introduced](https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/51) in GitLab Enterprise Edition 8.2.