1Co 11:4 Every man praying or prophesying, having his head covered, dishonors his head.
1Co 11:5 But every woman who prays or prophesies with her head uncovered dishonors her head, for that is one and the same as if her head were shaved.
In Corinthians Paul speaks about men prophesying with their head covered and women prophesying with their head uncovered. Some people interpret these “coverings” as hats. Men cannot wear a hat in church and women must always being wearing a hat.
But that is not the point that Paul seems to be trying to make. Instead the focus is on hair. In verse 5 he talks about being “shaved”. In the following verses he references haircuts even more:
1Co 11:6 For if a woman is not covered, let her also be shorn. But if it is shameful for a woman to be shorn or shaved, let her be covered.
He contrasts “shorn” and “shaven” with “covered”. They seem to be opposites. He goes on a few verses later:
1Co 11:10 For this reason the woman ought to have a symbol of authority on her head, because of the angels…
1Co 11:13 Judge among yourselves. Is it proper for a woman to pray to God with her head uncovered?
1Co 11:14 Does not even nature itself teach you that if a man has long hair, it is a dishonor to him?
1Co 11:15 But if a woman has long hair, it is a glory to her; for her hair is given to her for a covering.
In verse 13 Paul talks about having a head uncovered. In verse 14 he contrasts this to men having long hair. Then in verse 15 he points out that hair is “covering”. The hair is woman’s “glory” (compare this to verse 10).
So in 1 Corinthians, Paul does not seem to be talking about hats and veils, but long and short hair. Men should not have long hair (God does not like it and thus when long haired men try to talk to God or for God, they dishonor themselves). Woman should not have short hair, it is just as if they were bald.
reality is not optional 
So how do you make sense of verse 6? If the covering the woman is supposed to have is long hair, how is she supposed to cut off what she doesn’t have?
That would be saying girls with pixie haircuts might as well be bald all the way. There is no difference. I don’t think it’s a command.
Almost everyone in the ancient world had long hair by default, for them short hair is at least shoulder length. Jesus has always been a white man with long hair, there is a reason why the entire world knows him like this, and everyone who has seen him in visions has seen him like this, even those who did not know him before. If God wanted Him to be known different then the world would be very different now. The Shroud of Turin stands as an incredible testimony of the appearance of Jesus Christ, although now His glory and beauty has become eternal.
The people of the Middle East have always been from white to slightly dark and those who migrated elsewhere from the Tower of Babel changed characteristics, you can see it today, and you can see it in the past as well. When the Queen of Sheba went from Ethiopia to Israel for Solomon, the Israelites considered her exotic for her dark skin color, they were always light skinned in the Middle East. Moreover back then, short hair was considered shoulder length at least, almost everyone had shoulder length hair so it is only normal for Jesus to have slightly longer hair.
Those who say that Jesus was black or had short hair have nothing to do with Christianity or anything else regarding seeking the truth in general, they are either part of the weird black movements, anti-theistic darwinists or rejected liberal LGBTs and these types of nonsense. Moreover if someone holds a darwinian worldview because of the false religion of naturalism (atheism) then they will get the entire history of mankind completely wrong because of the fake reconstructions due the naturalistic presupossitions out of the fear of objective morality, but in the end noone can escape the divine judgement.