Unfortunately, my first attempt at brewing koffeebucha was not a success. After waiting 14 days (recommended in the directions that I was following), my SCOBY looked like this:
Though the SCOBY did appear to produce a baby, I was not sure whether the mother or baby were still alive, and so I decided not to risk tasting it. It may be necessary to brew a few batches of coffee-tea mixture in order to acclimate the SCOBY to the high acidity of coffee. Once I grow another baby SCOBY, I will try this.