一.问题描述：
由于最近一直在搞java开发，没怎么搞cicd了，突然想搞搞自己的项目，所以跑了一下jenkins，却发现原来搭好的job执行失败，GitHub上面的代码拉不下来
ERROR: Error fetching remote repo 'origin'
hudson.plugins.git.GitException: Failed to fetch from https://github.com/xxx.git
at hudson.plugins.git.GitSCM.fetchFrom(GitSCM.java:996)
at hudson.plugins.git.GitSCM.retrieveChanges(GitSCM.java:1237)
at hudson.plugins.git.GitSCM.checkout(GitSCM.java:1297)
at org.jenkinsci.plugins.workflow.steps.scm.SCMStep.checkout(SCMStep.java:125)
at org.jenkinsci.plugins.workflow.steps.scm.SCMStep$StepExecutionImpl.run(SCMStep.java:93)
at org.jenkinsci.plugins.workflow.steps.scm.SCMStep$StepExecutionImpl.run(SCMStep.java:80)
at org.jenkinsci.plugins.workflow.steps.SynchronousNonBlockingStepExecution.lambda$start$0(SynchronousNonBlockingStepExecution.java:47)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Caused by: hudson.plugins.git.GitException: Command "git fetch --tags --progress -- https://github.com/xxx.git +refs/heads/*:refs/remotes/origin/*" returned status code 128:
stdout:
stderr: fatal: unable to access ' https://github.com/xxx.git/': gnutls_handshake() failed: The TLS connection was non-properly terminated.
at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.launchCommandIn(CliGitAPIImpl.java:2450)
at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.launchCommandWithCredentials(CliGitAPIImpl.java:2051)
at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.access$500(CliGitAPIImpl.java:84)
at org.jenkinsci.plugins.gitclient.CliGitAPIImpl$1.execute(CliGitAPIImpl.java:573)
at hudson.plugins.git.GitSCM.fetchFrom(GitSCM.java:994)
... 11 more
二.问题分析：
首先我更新了一下Jenkins里面的全局凭据，但是结果还是拉取不了，突然想到八月份github出了新的验证政策，不再支持账号密码验证，采用access tokens的方式。所以换授权码试了一下，果然可以
三.问题解决
1.在GitHub生成token
2.后面可以采用两种方式
第一种：可以在Jenkins全局凭据配置中，增加一个username-password凭据，用户名可以随便写，密码输入保存好的token
第二种：?将token写入git的url里面，就不需要凭据了
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