For some weird reason, HipChat (v4) wasn’t introduced in the downloads page of the official site. It has only .deb package, but there’s a link in JIRA ticket with the rpm sources:

[atlassian-artifactory]
name=Atlassian-artifactory
baseurl=http://atlassian.artifactoryonline.com/atlassian/hipchat-yum-client
enabled=1
gpgcheck=0