There was a problem on f-droids side which prevented Tusky from building. It has been resolved and Tusky 1.3.1 sould be available on f-droid soon!
@Tusky Thanks for your work!
@Tusky COOL! I was wondering why we didn't have the app on it yet :D
@Tusky Tusky is still showing as 1.2.1 for me, F-Droid on Android 6.1
@tindall yes we know :( We already told the f-droid folks to rebuild Tusky no idea why it takes so long.
@Tusky Good to know it's not a problem on my end. I hope they're able to give you a useful answer!