CREATE TABLE table_15306124_1 (league_of_communists INT, municipality VARCHAR)

What is the least amount of league of communists where municipality is mojkovac
SELECT MIN(league_of_communists) FROM table_15306124_1 WHERE municipality = "Mojkovac"
SELECT MIN("league_of_communists") FROM "table_15306124_1" WHERE "Mojkovac" = "municipality"