SpecialOpsPepe Afaik you can't do that, see the staff answer on this topic
What I could recommend is binding the command to a key that you'll press when in-game to set your fovScale again. You could do that with /bind P "cg_fovscale N" ofc replace P with any unused key and N by the number you want. If you have issues with /cg_fov too you can use /cg_fov_default to make it permanent.