How to provide custom baseURL before running fastlane command to build ad-hoc

Question

I have one project with multiple Schemes, eg. DEV, PROD etc. Now i want to build ad-hoc for each Scheme and upload to firebase.

This part is done using fastlane. I defined lanes for each Scheme and then run lane commands from terminal. Take for an example of DEV scheme, run

fastlane do_everything_dev

here in lane do_everything i have added,

desc "build and upload dev to firebase"
  lane :do_everything_dev do
      clean
      build_beta_dev
      upload_firebase_dev
  end

Each lane clean, build_beta_dev, upload_firebase_dev have required codes to run the lane.

Now my next task is that i want to replace the baseURL in DEV scheme of my iOS app using fastlane.

Example:- If the baseURL of DEV scheme is https://baseurl.com/{endpoint}

I want to replace https://baseurl.com/{endpoint} with https://newbaseurl.com/{endpoint} using fastlane.

Before putting it here i searched on internet the closest i reached for my requirement is this https://docs.fastlane.tools/advanced/Fastfile/