`clonerefs` output is ignored, so tests can run with with incorrect refs

[stevekuznetsov]

We ignore the output of clonerefs due to 7ad9489 and 9aa7a8a.

That's simply wrong and must be fixed.

We should either run initupload or write the log and read it ourselves, the output is simple.

If we had done this, the master-dockerless-build-temporary issue would not have happened.

/assign @smarterclayton

[smarterclayton]

You mean, we should have read the log to find out that clone failed?

[stevekuznetsov]

Thats exactly the (well documented) API for the tool...