Following @chepner advice for the .gitattribute file I used him proposed configuration. It didn't work as expected so I did some more digging. Turns out the answer was in the Git manual! (RTFM, I know right?!).
Check the EFFECTS section on Git Manual.
eol
This attribute sets a specific line-ending style to be used in the
working directory. It enables end-of-line normalization without any
content checks, effectively setting the text attribute.
Set to string value "crlf"
This setting forces Git to normalize line
endings for this file on checkin and convert them to CRLF when the
file is checked out.
Set to string value "lf"
This setting forces Git to normalize line
endings to LF on checkin and prevents conversion to CRLF when the file
is checked out.
What I actually needed is -text. By using -text you ask Git to treat that file as a binary and not affect its line endings.
Unsetting the text attribute on a path tells Git not to attempt any
end-of-line conversion upon checkin or checkout.
And the backwards compatible version:
Backwards compatibility with crlf attribute
For backwards compatibility, the crlf attribute is interpreted as follows:
crlf text
-crlf -text
crlf=input eol=lf