Invite engineers to solve it in a way that makes it cheap for them.

Most shops I've been at prefix their branch names with ticket numbers ("bug-X-" or "TCKT-Y-"), and then it's trivial to reference it back. Some will write scripts on top, which gets them even more motivated to solve your problem (and might add links into the tracking tools too, move the ticket to "In Review" when the PR is up, close it after it's merged...).