UserAgent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/56.0.2924.87 Safari/537.36

Steps to reproduce the problem:
This is for libiota project that uses cbuildbot for build waterfall. https://uberchromegw.corp.google.com/i/internal.client.weave/console

We wanted to enhance the builder to build and generate artifacts required for testing. This meant that we needed to make use of some proprietary tools for the build. So a new private manifest repo branch was created which will point to teams repo that had these proprietary tools.

1. When the buildbot change to point to the manifest file in private branch was added.
2. The builder started to fail as it cannot fetch the manifest repo anymore.

Here is the detailed error message -
Error messages:
fatal: Couldn't find remote ref refs/heads/libiota-internal
fatal: Couldn't find remote ref refs/heads/libiota-internal
fatal: cannot obtain manifest https://weave.googlesource.com/weave/manifest

@@@STEP_FAILURE@@@
21:15:03: ERROR: Traceback (most recent call last):
  File "/mnt/data/b/cbuild/libiota/chromite/cbuildbot/stages/generic_stages.py", line 525, in Run
    self.PerformStage()
  File "/mnt/data/b/cbuild/libiota/chromite/config/builders/weave_builders.py", line 71, in PerformStage
    weave_repo.Initialize()
  File "/mnt/data/b/cbuild/libiota/chromite/cbuildbot/repository.py", line 331, in Initialize
    cros_build_lib.RunCommand(init_cmd, cwd=self.directory, input='\n\ny\n')
  File "/mnt/data/b/cbuild/libiota/chromite/lib/cros_build_lib.py", line 624, in RunCommand
    raise RunCommandError(msg, cmd_result)
RunCommandError: return code: 1; command: repo init --repo-url https://chromium.googlesource.com/external/repo --manifest-url https://weave.googlesource.com/weave/manifest --manifest-name default.xml --manifest-branch libiota-internal
cwd=/mnt/data/b/cbuild/libiota_weave

Error log link:
https://uberchromegw.corp.google.com/i/internal.client.weave/builders/libiota/builds/770/steps/WeaveSync/logs/stdio

What is the expected behavior?
Buildbot should fetch the manifest file from the private branch and continue the build process.

What went wrong?
Buildbot doesn't have access to fetch manifest from private branch.

Did this work before? N/A 

Chrome version:   Channel: n/a
OS Version: 
Flash Version: