git grep -F doesn't behave like grep -F?

Hi folks,

git grep -F is documented as: "Use fixed strings for patterns (don’t
interpret pattern as a regex)."

whereas grep -F is documented as "Interpret PATTERN as a  list  of
fixed  strings,  separated  by newlines,  any  of  which is to be
matched."

This accurately describes how they behave, which means that git grep
-F with a pattern containing newlines never matches anything (at least
as far as I can see). Is this intentional, or an oversight? The
ability to grep -F for a list (e.g. the output of another grep) is
pretty handy...

-- 
Torne (Richard Coles)
torne@google.com