What are the minimum GIT requirements to make changelogPush work?

[ghilainm]

I am running on gitlab-ci and it seems that the clone performed by gitlab is not enough to make changelogPush works properly.

I am getting the following error:

Execution failed for task ':changelogCheck'.
> Expected ref refs/heads/develop

Could you update the documentation to provide a bit more insights on the expected requirements to run the task? Can you maybe try to manually retrieve the missing ref if they exist remotely as fallback?

[nedtwigg]

Our error message should be better, but I'll dupe this out to #33.