I could make some of the chants. Your basic football chants like
Who is the best - Slavia
Only red and white
Who's going to win the title - Slavia
and of course some derogatory Sparta Prague chants (Slavia vs Sparta = PAOK vs Aris or Panathinaikos vs Olympiakos type matchup)
Besides Stoch, Tomas Necid also plays for Slavia.
The last football game I saw before I left Czechoslovakia in 1976 was between Banik Ostrava and Slavia Prague. Good guys won 2:0. Remember this as if it was yesterday.