hiding an autohits referrer

I am using a variety of autohit sites (please don't judge me!) to generate some traffic in order to be accepted by a cpm advertising website. However, pretty sure that a cpm site I have used in the past has spotted this. Can I cloak the referrer as being autohits.xxx so that it shows only my website address?

I have read a number of posts on the forum already but what I seem to be reading is cloaking of affiliate url's rather than what I am trying to do.

I suggest you get the autohits to some php and use something like

I am going to test that out soon