Zelena, the Wicked Witch of the West, needs a heart, courage, and a brain for her time travel spell. Those are the three things that the Scarecrow, the Tinman, and the Lion traveled to Oz to ask for from the Wizard in The Wizard of Oz.
In Scream (1996) Rose McGowan's character Tatum states "What am I, the beer wench?" In this episode, her character Cora is a beer wench.