build(git): avoid calling bash from kotlin called from bash

[marcin-kozinski]

I noticed I was calling bash from a kotlin script called from bash. Instead refactored the kotlin script to be more focussed on the task and added the conditionals that used bash to the calling bash script.

References

PR Checklist

Setup:

• Described changes for automated release notes in PR title using
  Conventional Commits standard
• Self Review (review, clean up, documentation)
• Basic Self QA

Review:

• Code Review approved