In order for our enterprise nightlies to run the same test-go job but
across a matrix of different base references we need to consider the
checkout ref in our failure and summary uploads in order to prevent
an upload race.
We also configure Git with our token before setting up Go so that
enterprise CI workflows can execute without downloading a module cache.
Signed-off-by: Ryan Cragun <me@ryan.ec>
c9340dc7d5