Traditions and vain fashion trends of man mean nothing to God. Mary was impregnated while unmarried, disgraceful. Jesus was born in a dirty filthy animal shed, disgraceful. The witnesses to his birth that spread the news were poor shepherds, not kings, disgraceful. He was raised in the backwoods dirt poor town of Nazareth, basically the sticks, "What good can come from Nazareth?", disgraceful. The man that God sent to prepare the people for Jesus' arrival, to make straight his path, was a dirt poor wildman preacher from an outcast sect who wore the equivalent of rags, ate bugs, and had long hair, disgraceful. That same man was arrested as a criminal and beheaded at the pleasure of elite women as a party favor, disgraceful. During his ministry, with few exceptions, Jesus walked everywhere, no horse, no cart, just dirt worn down sandals, disgraceful. His clothes were not trendy or fancy like the established religious men, he wore one single plain looking outfit his whole ministry, disgraceful. He owned no home, he always depended on charity like a vagabond, birds have nests and foxes have dens, but Jesus had no place to rest his head, disgraceful. He was always at odds with the men whom society held in esteem. He was driven out of towns, betrayed by one of his inner circle, arrested, tortured, slandered and finally given the death sentence of a common criminal. All very disgraceful, if you care about such things.

By the way, the Nazarite vow, established by God, included many self sacrificial actions as a way of offering up worship to God, one of which to not cut your hair. Most people who took the vow only did so for a few months at most, but some did it for much longer or even their whole lives, like Sampson, thus his long hair.

God doesn't care about fashionable tends.