Please advise how to perform Masah of the head during Wudu. Do the hair need to get wet, what portion? Do the fingers need to touch the scalp or go thru the hair or simply over the hair?

According to the Hanafi Madhab, it is Fardh to make Masah of one quarter of
the head. It is not necessary for the fingers to touch the scalp. It is
sufficient for the fingers to pass over the hair. (Hidaaya vol.1 pg.17)

and Allah Ta'ala Knows Best

Mufti Ebrahim Desai