If your change is non trivial then we ask you to create an issue (=ticket) in JIRA first (if none exists). Trivial changes can be made without an issue.
The following workflow applies to issues:
Start working on an issue:
move the issue to state "In Progress"
assign it to yourself
Finish your work
comment your change (e.g. link the pull request)
remove the assignment
move the issue to state "Review needed"
Review (done by some-one else)
assign the issue to yourself
comment the successful review / your findings
OK: move the issue to state "Done" and re-assign it to the original author
Findings: move the ticket to state "Review failed" and re-assign it to the original author