The 20-year-old, who was on the bench for the Europa League tie against Astana last year, embarks on his first temporary move away from the club following a successful season for Neil Wood’s side, which saw them achieve promotion.
Kovar joined United in 2018 from FC Slovacko and has featured 45 times in competitive games, across the Under-18s and Under-23s, keeping 13 clean sheets in the process.
The Czech Republic Under-20 international will now join up with former United Academy player, and current Swindon Town manager, Richie Wellens as he embarks on his first experience of regular senior football.