Today, I added comment "pretty please pagure-ci rebuild" to a PR, but it seems it does not work, no job is triggered in Jenkins.
The pagure_ci service got stuck doing one call, despite it having a timeout specified. I'm looking more into but I restarted the service in the mean time so if you try now it should work again.
Could you point me to the PR where you added the comment?
Metadata Update from @pingou: - Issue assigned to pingou
Commit a25cd03a fixes this issue