My job is configured with

• "Repository depth" "immediates"
• "Use SVN update as much as possible"

When I start it without a workspace (very first run), I got:
{{
Started by user Martin Jost
[EnvInject] - Loading node environment variables.
Building on master in workspace /x/y/z Checking out a fresh workspace because Jenkins failed to detect the current workspace /x/y/z
ERROR: svn: E155010: The node '/x/y/z' was not found.
org.tmatesoft.svn.core.SVNException: svn: E155010: The node '/x/y/z' was not found.
at org.tmatesoft.svn.core.internal.wc.SVNErrorManager.error(SVNErrorManager.java:64)
at org.tmatesoft.svn.core.internal.wc.SVNErrorManager.error(SVNErrorManager.java:51)
at org.tmatesoft.svn.core.internal.wc17.db.SvnWcDbShared.readInfo(SvnWcDbShared.java:744)
at org.tmatesoft.svn.core.internal.wc17.db.SvnWcDbShared.readInfo(SvnWcDbShared.java:553)
at org.tmatesoft.svn.core.internal.wc17.db.SVNWCDb.readInfo(SVNWCDb.java:3558)
at org.tmatesoft.svn.core.internal.wc17.db.SVNWCDb.readInfo(SVNWCDb.java:3527)
at org.tmatesoft.svn.core.internal.wc17.SVNWCContext.nodeWalkChildren(SVNWCContext.java:1548)
at org.tmatesoft.svn.core.internal.wc2.ng.SvnNgGetInfo.run(SvnNgGetInfo.java:80)
at org.tmatesoft.svn.core.internal.wc2.ng.SvnNgGetInfo.run(SvnNgGetInfo.java:51)
at org.tmatesoft.svn.core.internal.wc2.ng.SvnNgOperationRunner.run(SvnNgOperationRunner.java:20)
at org.tmatesoft.svn.core.internal.wc2.SvnOperationRunner.run(SvnOperationRunner.java:21)
at org.tmatesoft.svn.core.wc2.SvnOperationFactory.run(SvnOperationFactory.java:1259)
at org.tmatesoft.svn.core.wc2.SvnOperation.run(SvnOperation.java:294)
at org.tmatesoft.svn.core.wc.SVNWCClient.doInfo(SVNWCClient.java:2485)
at hudson.scm.subversion.UpdateUpdater$TaskImpl.parseSvnInfo(UpdateUpdater.java:126)
at hudson.scm.subversion.UpdateUpdater$TaskImpl.getSvnCommandToUse(UpdateUpdater.java:88)
at hudson.scm.subversion.UpdateUpdater$TaskImpl.perform(UpdateUpdater.java:131)
at hudson.scm.subversion.WorkspaceUpdater$UpdateTask.delegateTo(WorkspaceUpdater.java:162)
at hudson.scm.SubversionSCM$CheckOutTask.perform(SubversionSCM.java:991)
at hudson.scm.SubversionSCM$CheckOutTask.invoke(SubversionSCM.java:972)
at hudson.scm.SubversionSCM$CheckOutTask.invoke(SubversionSCM.java:948)
at hudson.FilePath.act(FilePath.java:981)
at hudson.FilePath.act(FilePath.java:959)
at hudson.scm.SubversionSCM.checkout(SubversionSCM.java:897)
at hudson.scm.SubversionSCM.checkout(SubversionSCM.java:833)
at hudson.scm.SCM.checkout(SCM.java:484)
at hudson.model.AbstractProject.checkout(AbstractProject.java:1265)
at hudson.model.AbstractBuild$AbstractBuildExecution.defaultCheckout(AbstractBuild.java:622)
at jenkins.scm.SCMCheckoutStrategy.checkout(SCMCheckoutStrategy.java:86)
at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:528)
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)
Cleaning local Directory .
...
}}

Then the job passed ("green"; no other problem visible)
When I start the job another time, I didn't get the problem.
After deleting the workspace, I got it again (as the message indicates)