Can you add a specific free form field as a hook on a GIT merge or commit command to Master?

[Paul McManus]

Hi, I want to try to trace requirements implementation to a specific GIT merge or commit to Master by adding a comment into source code on a GIT commit or merge to Master branch once a review in Bitbucket has been approved. I will then want to parse the source code later with a list of requirements to prove individual requirements are linked to specific git commit or merge to Master.

I was thinking of filling out a free form field in a JIRA ticket with the requirement identifier text, then seeing if there would be a way to add this free form field text into a source code comment header at the top of a file.

Or is there an easier way to do this?