There is no F22 version of UMIT in the repos. From the master Fedora mirror [0], the available package is umit-1.0-3.fc21.noarch [0] http://dl.fedoraproject.org/pub/fedora/linux/development/22/x86_64/os/Packages/u/
I was just informed this is due to no mass rebuild for F22. Disregard, I was mistaken.