How can I make sure that a merge request contains the latest merge details?

Drill down the merge request, click Actions > Reprocess Merge on the Review Merge Request page to refresh the details of the merge request. You can refresh the details of a merge request only when the merge request is in error, rejected, or new statuses. Note that this option refreshes the details of the current merge request and doesn't trigger another merge request. Also, if this merge request is created from a duplicate identification batch, it doesn't trigger duplicate identification process to recreate the merge request.