kubernetes: ERROR: Error fetching remote repo 'origin'

https://pantheon.corp.google.com/storage/browser/kubernetes-jenkins/pr-logs/pull/26820/kubernetes-pull-build-test-e2e-gce/43224/

ERROR: Error fetching remote repo 'origin'
hudson.plugins.git.GitException: Failed to fetch from https://github.com/kubernetes/kubernetes
    at hudson.plugins.git.GitSCM.fetchFrom(GitSCM.java:810)
    at hudson.plugins.git.GitSCM.retrieveChanges(GitSCM.java:1066)
    at hudson.plugins.git.GitSCM.checkout(GitSCM.java:1097)
    at hudson.scm.SCM.checkout(SCM.java:485)
    at hudson.model.AbstractProject.checkout(AbstractProject.java:1269)
    at hudson.model.AbstractBuild$AbstractBuildExecution.defaultCheckout(AbstractBuild.java:607)
    at jenkins.scm.SCMCheckoutStrategy.checkout(SCMCheckoutStrategy.java:86)
    at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:529)
    at hudson.model.Run.execute(Run.java:1738)
    at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)
    at hudson.model.ResourceController.execute(ResourceController.java:98)
    at hudson.model.Executor.run(Executor.java:410)
Caused by: hudson.plugins.git.GitException: Command "/usr/bin/git -c core.askpass=true fetch --tags --progress https://github.com/kubernetes/kubernetes +refs/pull/26820/*:refs/remotes/origin/pr/26820/*" returned status code 128:
stdout: 
stderr: error: RPC failed; result=18, HTTP code = 200
fatal: The remote end hung up unexpectedly

    at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.launchCommandIn(CliGitAPIImpl.java:1719)
    at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.launchCommandWithCredentials(CliGitAPIImpl.java:1463)
    at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.access$300(CliGitAPIImpl.java:63)
    at org.jenkinsci.plugins.gitclient.CliGitAPIImpl$1.execute(CliGitAPIImpl.java:314)
    at org.jenkinsci.plugins.gitclient.RemoteGitImpl$CommandInvocationHandler$1.call(RemoteGitImpl.java:152)
    at org.jenkinsci.plugins.gitclient.RemoteGitImpl$CommandInvocationHandler$1.call(RemoteGitImpl.java:145)
    at hudson.remoting.UserRequest.perform(UserRequest.java:120)
    at hudson.remoting.UserRequest.perform(UserRequest.java:48)
    at hudson.remoting.Request$2.run(Request.java:332)
    at hudson.remoting.InterceptingExecutorService$1.call(InterceptingExecutorService.java:68)
    at java.util.concurrent.FutureTask.run(FutureTask.java:262)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at java.lang.Thread.run(Thread.java:745)
    at ......remote call to agent-pr-2(Native Method)
    at hudson.remoting.Channel.attachCallSiteStackTrace(Channel.java:1416)
    at hudson.remoting.UserResponse.retrieve(UserRequest.java:220)
    at hudson.remoting.Channel.call(Channel.java:781)
    at org.jenkinsci.plugins.gitclient.RemoteGitImpl$CommandInvocationHandler.execute(RemoteGitImpl.java:145)
    at sun.reflect.GeneratedMethodAccessor79.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.jenkinsci.plugins.gitclient.RemoteGitImpl$CommandInvocationHandler.invoke(RemoteGitImpl.java:131)
    at com.sun.proxy.$Proxy58.execute(Unknown Source)
    at hudson.plugins.git.GitSCM.fetchFrom(GitSCM.java:808)
    ... 11 more
ERROR: null