I've extended a certain job with a project containing centralized build-scripts, thus I set the checkout-path to "../BUILD" for this repo, the other remained unchanged. The build works fine, however, the build is triggered all 15 mins (Poll SCM = */15 * * * *), although nothing has changed in neither repo.
The git-revision for both repos is shown correctly, only the plugin doesn't recognize it hasn't changed.

This is a blocker for me that prevents me from using the plugin, because I can't afford 20 builds to run every 15 minutes.