The kodo is still obtainable, as is the swift brewfest ram.
The one being referred to is the non-armored ‘regular’ brewfest ram
Back then all mounts didn’t scale to riding skill, so a lot of people like Segovia’s guildmates, figured ‘why bother with a regular ground speed ram, when you can get the epic speed one’, also not figuring Blizzard would remove the ability to get the regular one so that only those who did the quest that very first year would ever be able to.
I got it because it was the only regular and armored ram available to ride on the Horde, but I still feel it should still be available to those who would want it now regardless.