Started by upstream project "<a href='/jenkins/job/bcc-pr/' class='model-link'>bcc-pr</a>" build number <a href='/jenkins/job/bcc-pr/1078' class='model-link'>1078</a>
originally caused by:
 GitHub pull request #3511 of commit 12c32bdff913f90dff464be309d8700033f83976, no merge conflicts.
Running as SYSTEM
Building remotely on <a href='/jenkins/computer/fedora28-slave-c46' class='model-link'>fedora28-slave-c46</a> (fc28) in workspace /home/fedora/jenkins/workspace/bcc-pr/label/fc28
The recommended git tool is: NONE
No credentials specified
Cloning the remote Git repository
Cloning repository <a href='https://github.com/iovisor/bcc.git'>https://github.com/iovisor/bcc.git</a>
 &gt; git init /home/fedora/jenkins/workspace/bcc-pr/label/fc28 # timeout=10
Fetching upstream changes from <a href='https://github.com/iovisor/bcc.git'>https://github.com/iovisor/bcc.git</a>
 &gt; git --version # timeout=10
 &gt; git --version # 'git version 2.17.1'
 &gt; git fetch --tags --progress -- <a href='https://github.com/iovisor/bcc.git'>https://github.com/iovisor/bcc.git</a> +refs/heads/*:refs/remotes/origin/* # timeout=10
 &gt; git config remote.origin.url <a href='https://github.com/iovisor/bcc.git'>https://github.com/iovisor/bcc.git</a> # timeout=10
 &gt; git config --add remote.origin.fetch +refs/heads/*:refs/remotes/origin/* # timeout=10
 &gt; git config remote.origin.url <a href='https://github.com/iovisor/bcc.git'>https://github.com/iovisor/bcc.git</a> # timeout=10
Fetching upstream changes from <a href='https://github.com/iovisor/bcc.git'>https://github.com/iovisor/bcc.git</a>
 &gt; git fetch --tags --progress -- <a href='https://github.com/iovisor/bcc.git'>https://github.com/iovisor/bcc.git</a> +refs/pull/*:refs/remotes/origin/pr/* # timeout=10
JENKINS-19022: warning: possible memory leak due to Git plugin usage; see: <a href='https://wiki.jenkins.io/display/JENKINS/Remove+Git+Plugin+BuildsByBranch+BuildData'>https://wiki.jenkins.io/display/JENKINS/Remove+Git+Plugin+BuildsByBranch+BuildData</a>
Checking out Revision 65af3ea0ca07ba8cf8da7da62545c2a19911cb48 (refs/remotes/origin/pr/3511/merge)
 &gt; git config core.sparsecheckout # timeout=10
 &gt; git checkout -f 65af3ea0ca07ba8cf8da7da62545c2a19911cb48 # timeout=10
FATAL: Could not checkout 65af3ea0ca07ba8cf8da7da62545c2a19911cb48
hudson.plugins.git.GitException: Command "git checkout -f 65af3ea0ca07ba8cf8da7da62545c2a19911cb48" returned status code 128:
stdout: 
stderr: fatal: reference is not a tree: 65af3ea0ca07ba8cf8da7da62545c2a19911cb48

	at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.launchCommandIn(CliGitAPIImpl.java:2639)
	at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.access$1100(CliGitAPIImpl.java:84)
	at org.jenkinsci.plugins.gitclient.CliGitAPIImpl$9.execute(CliGitAPIImpl.java:2956)
Also:   hudson.remoting.Channel$CallSiteStackTrace: Remote call to fedora28-slave-c46
		at hudson.remoting.Channel.attachCallSiteStackTrace(Channel.java:1800)
		at hudson.remoting.UserRequest$ExceptionResponse.retrieve(UserRequest.java:356)
		at hudson.remoting.Channel.call(Channel.java:1001)
		at org.jenkinsci.plugins.gitclient.RemoteGitImpl$CommandInvocationHandler.execute(RemoteGitImpl.java:146)
		at sun.reflect.GeneratedMethodAccessor236.invoke(Unknown Source)
		at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
		at java.lang.reflect.Method.invoke(Method.java:498)
		at org.jenkinsci.plugins.gitclient.RemoteGitImpl$CommandInvocationHandler.invoke(RemoteGitImpl.java:132)
		at com.sun.proxy.$Proxy166.execute(Unknown Source)
		at hudson.plugins.git.GitSCM.checkout(GitSCM.java:1351)
		at hudson.scm.SCM.checkout(SCM.java:505)
		at hudson.model.AbstractProject.checkout(AbstractProject.java:1204)
		at hudson.model.AbstractBuild$AbstractBuildExecution.defaultCheckout(AbstractBuild.java:636)
		at jenkins.scm.SCMCheckoutStrategy.checkout(SCMCheckoutStrategy.java:86)
		at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:508)
		at hudson.model.Run.execute(Run.java:1907)
		at hudson.matrix.MatrixRun.run(MatrixRun.java:153)
		at hudson.model.ResourceController.execute(ResourceController.java:97)
		at hudson.model.Executor.run(Executor.java:429)
Caused: hudson.plugins.git.GitException: Could not checkout 65af3ea0ca07ba8cf8da7da62545c2a19911cb48
	at org.jenkinsci.plugins.gitclient.CliGitAPIImpl$9.execute(CliGitAPIImpl.java:2980)
	at org.jenkinsci.plugins.gitclient.RemoteGitImpl$CommandInvocationHandler$GitCommandMasterToSlaveCallable.call(RemoteGitImpl.java:161)
	at org.jenkinsci.plugins.gitclient.RemoteGitImpl$CommandInvocationHandler$GitCommandMasterToSlaveCallable.call(RemoteGitImpl.java:154)
	at hudson.remoting.UserRequest.perform(UserRequest.java:211)
	at hudson.remoting.UserRequest.perform(UserRequest.java:54)
	at hudson.remoting.Request$2.run(Request.java:376)
	at hudson.remoting.InterceptingExecutorService.lambda$wrap$0(InterceptingExecutorService.java:78)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
Finished: FAILURE