Why was Nietzsche's last book called "Ecce Homo"?

I read that its title is ecce homo: why one becomes what one is, but I can’t put the two together. Isn’t ecce homo a saying?

“Ecce homo are the Latin words used by Pontius Pilate in the Vulgate translation of John 19:5, when he presents a scourged Jesus Christ, bound and crowned with thorns, to a hostile crowd shortly before his Crucifixion.”