I have a white leucistic that is the same way every shed (head skin issues). This is what I tried, each works well.
First and foremost, always soak before attempting any of these. I usually have mine soak for at least 30 mins.
Option 1 - Get the snake use to getting it's head touch
My snake was (and in some ways is still) the same, in that she does not like her head touched. But after a good soaking and around 15 mins of slowly touching her head area, I am able to. It is not perfect, in she can and will flinch and move, but it has become better with each handling.
In addition, you may want to handle often and build a trust with head petting.
Option 2 - Leave a scouring pad in the enclosure
I seen one YouTuber use this trick that works for him and his snakes. He uses the type that is part sponge and part scouring pad. He keeps it moist and leaves it in the snake's enclosure for the duration of the shed.
Option 3 - Use box handler work gloves
A friend of mine uses box handler work gloves to aid his snakes through tough sheds after a good soak. He uses the ones that have tacky rubber on the fingers and fingertips.
Option 4 - Do what Brian does
As mentioned by the previous member; Brian Barczyk uses a rubber finger pad to gently rub off any stuck shed pieces after a soak. You can find these at Staples, Wal-mart, ...
Hope this helps and good luck,
Galen