Can probation officer make me cut my hair?

i just gt outa the hall & put on probation. my hair is slick back just the top ina ponytail shaved sides bout 20inches long i been growin it 4a few years and now my po is tellin me i need to cut it. what if i dont? can she lock me back up? i have been growing out my hair for a long time & i dont want 2cut it