Nope sorry not familiar with the phrase. The term "sharf" does not appear in Webster nor Encyclopedia Britannica, can't find anything relating Hitler to head sharfs online but I did find a couple of mentions of the term sharf, apparently some sort of head covering, something related to a parade formation with horses, also a term in golf clubs and a couple of porn links. Also checked with two college profs and nothing.
So go ahead game, unless you're just babling, tell use what you mean.