find-file-visit-truename

find-file-visit-truename is a variable defined in `files.el'.
Its value is

nil

• This variable is safe as a file local variable if its value
  satisfies the predicate `booleanp'.

Documentation:
Non-nil means visiting a file uses its truename as the visited-file name.
That is, the buffer visiting the file has the truename as the
value of `buffer-file-name'. The truename of a file is found by
chasing all links both at the file level and at the levels of the
containing directories.

You can customize this variable.