Describe what you would like us to do:

With pagure 5.12, the PR Flag API endpoint flags the commit at the top of the PR instead of the PR itself.
This makes it clearer which commit was tested.
However, it also means that using the PR Flag API endpoint instead of the commit flag API endpoint exposes the risk of a race-condition if the PR is updated before the tests have finished running (this risk was always there, pagure 5.12 will just make it more obvious).

So the toddler that flags PR based on CI results, should be ported from the PR flag API endpoint to the commit flag API endpoint.

When do you need this to be done by? (YYYY/MM/DD)

ASAP once 5.12 is out and deployed (a beta version being already available in stg).