Started by user John
 > git rev-parse --is-inside-work-tree # timeout=10
Setting origin to http://jenkins@gerrit/a/sandbox
 > git config remote.origin.url http://jenkins@gerrit/a/sandbox # timeout=10
Fetching origin...
Looking for open changes with query 'p:sandbox status:open -age:24w ' ...
Fetching upstream changes from origin
 > git --version # timeout=10
 > git --version # 'git version 2.17.1'
 > git config --get remote.origin.url # timeout=10
using GIT_ASKPASS to set credentials gerrit http
 > git fetch --tags --progress -- origin refs/changes/84/10484/5:refs/remotes/origin/84/10484/5 # timeout=10
java.lang.NullPointerException
	at org.eclipse.jgit.lib.ObjectId.fromString(ObjectId.java:202)
	at jenkins.plugins.git.GitSCMFileSystem.<init>(GitSCMFileSystem.java:117)
	at jenkins.plugins.git.GitSCMFileSystem$BuilderImpl.build(GitSCMFileSystem.java:413)
	at jenkins.scm.api.SCMFileSystem.of(SCMFileSystem.java:316)
	at org.jenkinsci.plugins.workflow.multibranch.SCMBinder.create(SCMBinder.java:106)
	at org.jenkinsci.plugins.workflow.job.WorkflowRun.run(WorkflowRun.java:312)
	at hudson.model.ResourceController.execute(ResourceController.java:107)
	at hudson.model.Executor.run(Executor.java:449)
Finished: FAILURE