Use projectile-get-ext-command with counsel-projectile-rg?

[ameyp]

I'm customizing projectile-get-ext-command as follows:

(when (executable-find "rg")
    (progn
      (defconst ameyp/rg-arguments
        `("--line-number"                     ; line numbers
          "--smart-case"
          "--follow"                          ; follow symlinks
          "--mmap")                           ; apply memory map optimization when possible
        "Default rg arguments used in the functions in `projectile' package.")

      (defun ameyp/advice-projectile-use-rg (mode)
        "Always use `rg' for getting a list of all files in the project."
        (mapconcat 'identity
                   (append '("\\rg") ; used unaliased version of `rg': \rg
                           ameyp/rg-arguments
                           '("--null" ; output null separated results,
                             "--files" ; get file names matching the regex '' (all files)
                             "--hidden" ; include hidden files and folders...
                             "-g '!.git/'" ; ...except .git/
                             ))
                   " "))

      (advice-add 'projectile-get-ext-command :override #'ameyp/advice-projectile-use-rg)))

The primary usecase for me is that I want rg to look at hidden files and folders, but not .git. This works perfectly with counsel-projectile-find-file, it includes hidden files in the results. But it doesn't work with counsel-projectile-rg, the search doesn't look at hidden files.