Bug Report

I have two custom resources. The first one is only used with put to trigger deployments. With a put I am passing it files from other resources, which it then proceeds to read and process:

- name: deploy-staging
  plan:
  - get: repo
    passed: [build]
  - put: custom-deployment-resource
    params:
      version: repo/.git/HEAD

This works fine. However, I'm not having any luck doing the same on get:

- name: deploy
  plan:
  - get: repo
    passed: [build]
  - get: generate-config
    params:
      version: repo/.git/HEAD

This resolves in "No such file or directory repo/.git/HEAD". Is this a feature, or am I doing something wrong?