Loki, god of mischief, cut off the long golden hair of the goddess of the harvest. And this is what her husband did …
Sif's husband was Thor, and he was so angry that he went to his father, Odin, and demanded a judgement. Odin made Loki go under the Earth to the gnomes, and they, liking Loki, spun a cap of gold, which he took back to Sif, and she was happy.