RemoteUrl in git info seems to be incorrectly formatted

This was raised by a comment on #826

**Intended outcome:**

The remoteUrl in the gitInfo function has the remote repository url.

**Actual outcome:**

Depending on where in the file you are, it may be defined as a `slug` (`apollographql/apollo-tooling`)

https://github.com/apollographql/apollo-tooling/blob/master/packages/apollo/src/git.ts#L52

or the remote url (`https://github.com/apollographql/apollo-tooling`)

https://github.com/apollographql/apollo-tooling/blob/master/packages/apollo/src/git.ts#L74

**How to reproduce the issue:**

Console log the values while running in a CI

Start in packages/apollo/src/git.ts at the referenced lines 52 and 74, and compare how gitInfo defines remoteUrl in each location. Reproduce by logging the values while running in CI. Done means remoteUrl consistently contains the remote repository URL rather than a repository slug.

Written by the indexing model from the issue text.