Link to buildbot status page:
https://build.chromium.org/p/chromium.perf/builders/Linux%20Builder/builds/64500

Linux builder is failing on most slaves in remote_run_result step.

Stack Trace:
Traceback (most recent call last):
  File "/b/.remote_run_cipd/recipes.py", line 568, in <module>
    ret = main()
  File "/b/.remote_run_cipd/recipes.py", line 508, in main
    return remote(args)
  File "/b/.remote_run_cipd/recipes.py", line 182, in remote
    return remote.main(args)
  File "/b/.remote_run_cipd/recipe_engine/remote.py", line 44, in main
WARNING: You do not have proper SSL libraries installed for python. You may be at risk for man in the middle attacks. Installing pyOpenSSL (see https://urllib3.readthedocs.io/en/latest/user-guide.html#ssl-py2 for more details), or using the recipe engine `--use-bootstrap` flag will ensure proper python SSL libraries.
    args.repository, args.revision, checkout_dir, allow_fetch=True)
@@@STEP_LINK@stdout-->stdio@https://luci-logdog.appspot.com/v/?s=chromium%2Fbb%2Fchromium.perf%2FLinux_Builder%2F64502%2F%2B%2Frecipes%2Fstdout@@@
  File "/b/.remote_run_cipd/recipe_engine/fetch.py", line 60, in wrapper
    return f(*args, **kwargs)
  File "/b/.remote_run_cipd/recipe_engine/fetch.py", line 185, in checkout
    revision = self._resolve_revision(repo, revision)
  File "/b/.remote_run_cipd/recipe_engine/fetch.py", line 273, in _resolve_revision
    rev_json = self._revision_metadata(repo, revision)
  File "/b/.remote_run_cipd/recipe_engine/fetch.py", line 267, in _revision_metadata
    '%s/+/%s?format=JSON' % (repo, requests.utils.quote(revision)))
  File "/b/.remote_run_cipd/recipe_engine/fetch.py", line 282, in _fetch_gitiles_json
    raise FetchError('Unexpected gitiles response: %s' % raw)
recipe_engine.fetch.FetchError