GitHub Advanced Security customers can now dry run custom secret scanning patterns at the enterprise level (in addition to the organization and repository levels previously available). Dry runs allow admins to understand a pattern's impact across the entire enterprise and hone the pattern before publishing and generating alerts.
Admins can compose a pattern then 'Save and dry run' to retrieve results from their selected repositories. Scan results will appear on screen as they're detected, but admins can leave the page and later come back to their saved pattern's dry run results.
For more information: