私の頭を

my head

→ 私
phrase Rare #32,775
my head A phrase meaning “my head” when it is the object of a verb; を marks it as the thing being acted on. The example sentences use it with verbs meaning “hit” or “strike.”
JA: 転んで私の頭をぶつけました。
EN: I fell and hit my head.

彼は私の頭をたたいた

He hit me on the head.

穴居人さん私の頭をゴルフクラブ殴って

Caveman, hit me over the head with a golf club.

— ザ・マン・フロム・アース (2007)