If that's the case, I'm not sure why I had to add the external repo given that I
have:
$ koji list-tag-inheritance --reverse f21
f21 (6)
├─f21-build (7)
├─f21-candidates (8)
├─f21-testing (9)
├─f21-released (10)
└─f22 (12)
├─f22-build (13)
├─f22-candidates (14)
├─f22-testing (15)
└─f22-released (16)