I have a variable and I want to pass it to a macros, I call the macros itself in pre_Hook

{% set v_name = 'BOS' %}

{{
    config(
      pre_hook=[ 
       "{{marcos_test(v_name)}}"
          ]
      
    )
}} 

it works, but in the macros itself it does not see the value of the variable

How can I call marcos in pre_hook so it will see the value of the variable ?
Global variable in dbt_project.yml file they are not suitable because I need a dynamic variable

someone please help