Copied over from here: https://pagure.io/fedora-ci/general/issue/81

1. create a src.fp.o Pull Request
2. CI job starts, all is good
3. push new commits or rebase

4. new CI job should start but does not
   ...

5. go to the pull request URL in the web browser or refresh it if you already have it open

6. new CI job should starts now

It seems that Pagure only notifies the Jenkins about new commits after the Pull Request page is displayed in browser (or maybe GET by HTTP is enough).

cc @pingou @churchyard