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Frenzied Fugue says this:
Enchantment — Aura
Enchant permanent
When Frenzied Fugue enters the battlefield or at the beginning of your upkeep, gain control of enchanted permanent until end of turn. Untap that permanent. It gains haste until end of turn.
If I enchant a permanent controled by my opponent, then make the Frenzied Fugue leave the battlefield (by sacrificing it, destroying, etc.), do I lose the control of the permanent at the end of the turn?
The "until end of turn" effect lasts until the end of the turn, regardless of whether or not Frenzied Fugue remains on the battlefield.
611.2a A continuous effect generated by the resolution of a spell or ability lasts as long as stated by the spell or ability creating it (such as “until end of turn”). If no duration is stated, it lasts until the end of the game.
If the effect read "[...] until end of turn or until Frenzied Fugue leaves the battlefield.", then you would lose control as soon as Frenzied Fugue left the battlefield.
