skaffold dev/run fails on files not added to git diff

[tariq-islam]

Issues without logs and details are more complicated to fix.
Please help us!

Expected behavior

1. Create a skaffold pipeline file and name it anything other than 'skaffold.yaml'
2. skaffold dev/run
3. Skaffold successfully builds and deploys

Actual behavior

Skaffold errors with:
Error: running skaffold steps: build: build step: generating tag: reading diff: open /Users/tariqislam/opt/hello-go/skaffold.yaml: no such file or directory

Information

This occurs with any file that is not added by git add after creation or file name change

Skaffold version: version... 0.5.0
Operating system: ... OSX
Content of skaffold.yaml: ...
apiVersion: skaffold/v1alpha2
kind: Config
build:
  artifacts:
  - imageName: <redacted>
    workspace: .
    docker: {}
  local: {}
deploy:
  kubectl:
    manifests:
      - hello-go*

Steps to reproduce the behavior

1. In examples/getting-started
2. Change name of skaffold.yaml to anything else
3. Run skaffold dev/run