Build failed in Jenkins: Build-UFS-image #1450

See <https://jenkins.freebsd.org/job/Build-UFS-image/1450/>

------------------------------------------
Started by upstream project "Build_Image_and_Run_Tests_in_Bhyve_HEAD" build number 949
originally caused by:
 Started by upstream project "FreeBSD_HEAD" build number 2606
 originally caused by:
  Started by an SCM change
Building remotely on jenkins-10.freebsd.org (FreeBSD-10) in workspace <https://jenkins.freebsd.org/job/Build-UFS-image/ws/>
 > git rev-parse --is-inside-work-tree # timeout=10
Fetching changes from the remote Git repository
 > git config remote.origin.url https://github.com/freebsd/freebsd-ci # timeout=10
Fetching upstream changes from https://github.com/freebsd/freebsd-ci
 > git --version # timeout=10
 > git -c core.askpass=true fetch --tags --progress https://github.com/freebsd/freebsd-ci +refs/heads/*:refs/remotes/origin/*
ERROR: Error fetching remote repo 'origin'
hudson.plugins.git.GitException: Failed to fetch from https://github.com/freebsd/freebsd-ci
	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:1751)
	at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)
	at hudson.model.ResourceController.execute(ResourceController.java:89)
	at hudson.model.Executor.run(Executor.java:240)
Caused by: hudson.plugins.git.GitException: Command "git -c core.askpass=true fetch --tags --progress https://github.com/freebsd/freebsd-ci +refs/heads/*:refs/remotes/origin/*" returned status code 128:
stdout: 
stderr: fatal: unable to access 'https://github.com/freebsd/freebsd-ci/': Unknown SSL protocol error in connection to github.com:443 

	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$1.execute(CliGitAPIImpl.java:324)
	at org.jenkinsci.plugins.gitclient.RemoteGitImpl$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:121)
	at hudson.remoting.UserRequest.perform(UserRequest.java:49)
	at hudson.remoting.Request$2.run(Request.java:325)
	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 jenkins-10.freebsd.org(Native Method)
	at hudson.remoting.Channel.attachCallSiteStackTrace(Channel.java:1360)
	at hudson.remoting.UserResponse.retrieve(UserRequest.java:221)
	at hudson.remoting.Channel.call(Channel.java:753)
	at org.jenkinsci.plugins.gitclient.RemoteGitImpl$CommandInvocationHandler.execute(RemoteGitImpl.java:145)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:606)
	at org.jenkinsci.plugins.gitclient.RemoteGitImpl$CommandInvocationHandler.invoke(RemoteGitImpl.java:131)
	at com.sun.proxy.$Proxy57.execute(Unknown Source)
	at hudson.plugins.git.GitSCM.fetchFrom(GitSCM.java:733)
	... 11 more
ERROR: Error fetching remote repo 'origin'