jenkins git 插件问题求大神指点

构建之后报错如下：
Started by user anonymous
Building in workspace /root/.jenkins/jobs/testjenkins/workspace
 > git rev-parse --is-inside-work-tree # timeout=10
Fetching changes from the remote Git repository
 > git config remote.origin.url git@git.khk.cc:hobby/test.git # timeout=10
Fetching upstream changes from git@git.khk.cc:hobby/test.git
 > git --version # timeout=10
 > git -c core.askpass=true fetch --tags --progress git@git.khk.cc:hobby/test.git +refs/heads/*:refs/remotes/origin/*
ERROR: Error fetching remote repo 'origin'
hudson.plugins.git.GitException: Failed to fetch from git@git.khk.cc:hobby/test.git
    at hudson.plugins.git.GitSCM.fetchFrom(GitSCM.java:735)
    at hudson.plugins.git.GitSCM.retrieveChanges(GitSCM.java:983)
    at hudson.plugins.git.GitSCM.checkout(GitSCM.java:1016)
    at hudson.scm.SCM.checkout(SCM.java:484)
    at hudson.model.AbstractProject.checkout(AbstractProject.java:1270)
    at hudson.model.AbstractBuild$AbstractBuildExecution.defaultCheckout(AbstractBuild.java:609)
    at jenkins.scm.SCMCheckoutStrategy.checkout(SCMCheckoutStrategy.java:86)
    at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:531)
    at hudson.model.Run.execute(Run.java:1741)
    at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)
    at hudson.model.ResourceController.execute(ResourceController.java:98)
    at hudson.model.Executor.run(Executor.java:374)
Caused by: hudson.plugins.git.GitException: Command "git -c core.askpass=true fetch --tags --progress git@git.khk.cc:hobby/test.git +refs/heads/*:refs/remotes/origin/*" returned status code 128:
stdout: 
stderr: ssh: connect to host git.khk.cc port 22: Connection timed out
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.

    at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.launchCommandIn(CliGitAPIImpl.java:1591)
    at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.launchCommandWithCredentials(CliGitAPIImpl.java:1379)
    at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.access$300(CliGitAPIImpl.java:86)
    at org.jenkinsci.plugins.gitclient.CliGitAPIImpl$1.execute(CliGitAPIImpl.java:324)
    at hudson.plugins.git.GitSCM.fetchFrom(GitSCM.java:733)
    ... 11 more
ERROR: Error fetching remote repo 'origin'
Finished: FAILURE
jenkins git 插件问题 求大神指点

jenkins git 插件问题求大神指点
