It's difficult to answer without knowing details i.e. precise anatomical location, depth of cut, length, width, method of injury, infection risk etc.
It would be advisable to see your GP in any case.
Usually though I would be inclined to say leave it alone, the scab is there to protect from infection and to re-organise and repair the damage.
Gently washing the area would be ok, but don't disturb the scab.
Unfortunately you may find that the area scars anyway, however scars mature and generally look better with time.
Depending on the extent of the injury and/or scarring it may be possible in future to have some revision surgery to improve the aesthetics, but this would typically only be after a long period of healing.