Remote end hung up unexpectedly (in testing) during rebase operation (bad ssh host key)

[Morgan Fainberg]

Occasionally testing will fail due to an issue performing a rebase.

2014-02-23 07:37:04.713 | Traceback (most recent call last):
2014-02-23 07:37:04.713 | File "/home/jenkins/workspace/gate-git-review-python33/git_review/tests/test_git_review.py", line 104, in test_need_rebase_no_upload
2014-02-23 07:37:04.713 | exc.args[0])
2014-02-23 07:37:04.713 | File "/home/jenkins/workspace/gate-git-review-python33/.tox/py33/lib/python3.3/site-packages/testtools/testcase.py", line 327, in assertIn
2014-02-23 07:37:04.713 | self.assertThat(haystack, Contains(needle))
2014-02-23 07:37:04.713 | File "/home/jenkins/workspace/gate-git-review-python33/.tox/py33/lib/python3.3/site-packages/testtools/testcase.py", line 406, in assertThat
2014-02-23 07:37:04.713 | raise mismatch_error
2014-02-23 07:37:04.713 | testtools.matchers._impl.MismatchError: 'Errors running git rebase -p -i remotes/gerrit/master' not in "Error occurred while processing the command:\n/home/jenkins/workspace/gate-git-review-python33/.tox/py33/bin/git-review.\nStdout: Problem running 'git remote update gerrit'\nFetching gerrit\nhash mismatch\r\nkey_verify failed for server_host_key\r\nfatal: The remote end hung up unexpectedly\nerror: Could not fetch gerrit\nStderr: None"

Example of this is http://logs.openstack.org/57/71657/1/gate/gate-git-review-python33/660279c/console.html#_2014-02-23_07_37_04_713

I have confirm this occurs in py33, but not sure about other test targets

[Morgan Fainberg (mdrnstm)]

This one also appears to be the same issue, different manifestation:
http://logs.openstack.org/57/71657/1/gate/gate-git-review-python27/d585548/