Checking out Revision 50ac39d85f0e9904f35306bb67dc9df1c84ad684 (origin/demo14)
> git config core.sparsecheckout # timeout=10
> git checkout -f 50ac39d85f0e9904f35306bb67dc9df1c84ad684
> git rev-list 50ac39d85f0e9904f35306bb67dc9df1c84ad684 # timeout=10
FATAL: Prefix string too short
java.lang.IllegalArgumentException: Prefix string too short
at java.io.File.createTempFile(File.java:1978)
at hudson.FilePath$17.invoke(FilePath.java:1357)
at hudson.FilePath$17.invoke(FilePath.java:1347)
at hudson.FilePath.act(FilePath.java:981)
at hudson.FilePath.act(FilePath.java:959)
at hudson.FilePath.createTextTempFile(FilePath.java:1347)
at com.lookout.jenkins.EnvironmentScript.generateEnvironment(EnvironmentScript.java:104)
at com.lookout.jenkins.EnvironmentScript.setUp(EnvironmentScript.java:93)
at hudson.model.Build$BuildExecution.doRun(Build.java:154)
at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:533)
at hudson.model.Run.execute(Run.java:1759)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)
at hudson.model.ResourceController.execute(ResourceController.java:89)
at hudson.model.Executor.run(Executor.java:240)

Can be worked aroung by renaming the job name to be at least 3 characters.