git log -S
The pickaxe: finds the commit where an expression was born or died.
The documentation calls it the pickaxe: -S only shows commits where the number of occurrences of the piece changed — where it was created, duplicated or removed. Commits that merely moved the line around don't pollute the result.
It is the question blame cannot answer: blame finds who touched the line that exists; the pickaxe finds who deleted the one that no longer does, or who introduced the function you are hunting by name.
$ git log -S 'fatiaTitulo' --oneline
9c2d4e1 helpers: extrai fatiaTitulo do template
3a8b7f2 templates: título fatiado no sub-artigo