Create a repo file: /etc/yum.repos.d/jitsi.repo with the following content:
[jitsi]
name=Jitsi
baseurl=https://download.jitsi.org/jitsi/rpm/
enabled=1
gpgcheck=0
Or directly use the file https://download.jitsi.org/jitsi/rpm/jitsi.repo
Run dnf install jitsi to install the latest jitsi build.