https://luci-milo.appspot.com/buildbot/chromeos/bob-nyc-android-pfq/517
https://luci-milo.appspot.com/buildbot/chromeos/caroline-nyc-android-pfq/947
https://luci-milo.appspot.com/buildbot/chromeos/hana-nyc-android-pfq/517

> remote: Short term bandwidth rate limit exceeded for 3su6n15k.default@developer.gserviceaccount.com
This looks like the cause.

22:17:27: INFO: RunCommand: git clone https://chrome-internal.googlesource.com/chromeos/manifest-versions /b/c/cbuild/repository/manifest-versions-internal in /b/c/cbuild/repository/manifest-versions-internal
22:17:31: WARNING: git reported transient error (cmd=clone https://chrome-internal.googlesource.com/chromeos/manifest-versions /b/c/cbuild/repository/manifest-versions-internal); retrying
Traceback (most recent call last):
  File "/b/c/cbuild/repository/chromite/lib/retry_util.py", line 176, in _Wrapper
    ret = func(*args, **kwargs)
  File "/b/c/cbuild/repository/chromite/lib/retry_util.py", line 242, in _run
    return functor(*args, **kwargs)
  File "/b/c/cbuild/repository/chromite/lib/cros_build_lib.py", line 653, in RunCommand
    raise RunCommandError(msg, cmd_result)
RunCommandError: return code: 128; command: git clone https://chrome-internal.googlesource.com/chromeos/manifest-versions /b/c/cbuild/repository/manifest-versions-internal
Cloning into '/b/c/cbuild/repository/manifest-versions-internal'...
remote: Short term bandwidth rate limit exceeded for 3su6n15k.default@developer.gserviceaccount.com
fatal: protocol error: bad pack header
[W git.go:283] Transient error string identified in STDERR: "fatal: protocol error: bad pack header\n"
[W git.go:294] Retrying after 3s (rc=128): transient error string encountered
Cloning into '/b/c/cbuild/repository/manifest-versions-internal'...
fatal: Unable to read current working directory: No such file or directory
[W git.go:317] Command completed with rc 128 after 1 transient failure(s).