Pulling to the master branch requires a completed Change Request Script Merge Checks – Require commits to be associated with a Jira issue Bitbucket Settings
The master branch is always working toward the next release and is the basis for that release’s branch
Therefore, changes to the master branch are strictly controlled
Proper authorization, via a completed change request, is required
Hook Type Require commits to be associated with a Jira issue
Note Require a valid completed change request when merging to the master branch.
Condition mergeRequest.pullRequest.toRef.id.matches("refs/heads/master")
JQL clause template (issueType in ("Change Request", "CR Sub-task"))
AND (status = "Completed")

Thanks for any help