The wiki seems to be correct:
yum --enablerepo=contribs --enablerepo=epel install smeserver-fail2ban
It does not have the code to show the latest versions.
You have wiki perms - please feel free if you think it needs clarification. Or open a bug.
If you would like to talk more with the team ask for a login to Rocket. We have a docs channel, and quite a nice little community at the minute with a few new volunteers helping. Join us.