java.lang.NullPointerException
   at org.eclipse.jgit.lib.RefUpdate.setNewObjectId(RefUpdate.java:283)
   at org.netbeans.libs.git.jgit.commands.UpdateRefCommand.run(UpdateRefCommand.java:94)
   at org.netbeans.libs.git.jgit.commands.GitCommand$1.run(GitCommand.java:80)
   at org.netbeans.libs.git.jgit.commands.GitCommand$1.run(GitCommand.java:77)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at org.netbeans.libs.git.jgit.commands.GitCommand.execute(GitCommand.java:77)
   at org.netbeans.libs.git.GitClient.updateReference(GitClient.java:1344)
   at org.netbeans.modules.git.client.GitClient$57.call(GitClient.java:850)
   at org.netbeans.modules.git.client.GitClient$57.call(GitClient.java:846)
   at org.netbeans.modules.git.client.GitClient$CommandInvoker$1$1.call(GitClient.java:956)
   at org.netbeans.modules.git.client.GitClient$CommandInvoker$1.call(GitClient.java:975)
   at org.netbeans.modules.git.client.GitClient$CommandInvoker.runMethodIntern(GitClient.java:987)
   at org.netbeans.modules.git.client.GitClient$CommandInvoker.runMethod(GitClient.java:916)
   at org.netbeans.modules.git.client.GitClient$CommandInvoker.runMethod(GitClient.java:898)
   at org.netbeans.modules.git.client.GitClient$CommandInvoker.access$400(GitClient.java:892)
   at org.netbeans.modules.git.client.GitClient.updateReference(GitClient.java:846)
   at org.netbeans.modules.git.ui.branch.BranchSynchronizer$Executor.execute(BranchSynchronizer.java:194)
   at org.netbeans.modules.git.ui.branch.BranchSynchronizer$Executor.access$000(BranchSynchronizer.java:120)
   at org.netbeans.modules.git.ui.branch.BranchSynchronizer$1.perform(BranchSynchronizer.java:92)
   at org.netbeans.modules.git.client.GitProgressSupport.performIntern(GitProgressSupport.java:115)
   at org.netbeans.modules.git.client.GitProgressSupport.run(GitProgressSupport.java:108)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1425)
   at org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:59)
   at org.openide.util.lookup.Lookups.executeWith(Lookups.java:294)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2038)
Caused: org.openide.util.RequestProcessor$SlowItem: task failed due to: java.lang.NullPointerException
   at org.openide.util.RequestProcessor.post(RequestProcessor.java:420)
   at org.netbeans.modules.git.client.GitProgressSupport.start(GitProgressSupport.java:101)
   at org.netbeans.modules.git.ui.branch.BranchSynchronizer.syncBranches(BranchSynchronizer.java:99)
   at org.netbeans.modules.git.ui.repository.RepositoryBrowserPanel$BranchNode$9$1.run(RepositoryBrowserPanel.java:1288)
   at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
   at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:749)
   at java.awt.EventQueue.access$500(EventQueue.java:97)
   at java.awt.EventQueue$3.run(EventQueue.java:702)
   at java.awt.EventQueue$3.run(EventQueue.java:696)
   at java.security.AccessController.doPrivileged(AccessController.java:0)
   at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:719)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:159)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)