Error updating VCS changes

After updating to IdeaC 2018.3 I seem to have more and more problems with updating local changes with GIT.

For one thing changes are not updated automatically anymore (had this problem previously from time to time, now it seems consistent). Invalidating cache and restarting helps for some minutes and then the problem comes back.

Refreshing manually from VCS toolbar gives "Error updating changes".

Here's the log:

```

10:40:45,103 [5003306] INFO - #GitStatus -
com.intellij.openapi.vcs.VcsException:
at git4idea.commands.GitCommandResult.throwOnError(GitCommandResult.java:155)
at git4idea.commands.GitCommandResult.getOutputOrThrow(GitCommandResult.java:144)
at git4idea.commands.GitImpl.untrackedFilesNoChunk(GitImpl.java:120)
at git4idea.commands.GitImpl.untrackedFiles(GitImpl.java:93)
at git4idea.repo.GitUntrackedFilesHolder.rescanAll(GitUntrackedFilesHolder.java:189)
at git4idea.repo.GitUntrackedFilesHolder.retrieveUntrackedFiles(GitUntrackedFilesHolder.java:172)
at git4idea.status.GitNewChangesCollector.collectUnversionedFiles(GitNewChangesCollector.java:116)
at git4idea.status.GitNewChangesCollector.<init>(GitNewChangesCollector.java:99)
at git4idea.status.GitNewChangesCollector.collect(GitNewChangesCollector.java:73)
at git4idea.status.GitChangeProvider.getChanges(GitChangeProvider.java:72)
at com.intellij.openapi.vcs.changes.ChangeListManagerImpl.actualUpdate(ChangeListManagerImpl.java:737)
at com.intellij.openapi.vcs.changes.ChangeListManagerImpl.iterateScopes(ChangeListManagerImpl.java:650)
at com.intellij.openapi.vcs.changes.ChangeListManagerImpl.lambda$updateImmediately$11(ChangeListManagerImpl.java:551)
at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$runProcess$2(CoreProgressManager.java:164)
at com.intellij.openapi.progress.impl.CoreProgressManager.registerIndicatorAndRun(CoreProgressManager.java:582)
at com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:532)
at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:87)
at com.intellij.openapi.progress.impl.CoreProgressManager.runProcess(CoreProgressManager.java:151)
at com.intellij.openapi.vcs.changes.ChangeListManagerImpl.updateImmediately(ChangeListManagerImpl.java:550)
at com.intellij.openapi.vcs.changes.ChangeListManagerImpl.lambda$new$0(ChangeListManagerImpl.java:129)
at com.intellij.openapi.vcs.changes.UpdateRequestsQueue$MyRunnable.run(UpdateRequestsQueue.java:225)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at com.intellij.util.concurrency.SchedulingWrapper$MyScheduledFutureTask.run(SchedulingWrapper.java:228)
at com.intellij.util.concurrency.BoundedTaskExecutor.doRun(BoundedTaskExecutor.java:227)
at com.intellij.util.concurrency.BoundedTaskExecutor.access$100(BoundedTaskExecutor.java:26)
at com.intellij.util.concurrency.BoundedTaskExecutor$2$1.run(BoundedTaskExecutor.java:200)
at com.intellij.util.ConcurrencyUtil.runUnderThreadName(ConcurrencyUtil.java:229)
at com.intellij.util.concurrency.BoundedTaskExecutor$2.run(BoundedTaskExecutor.java:194)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
2019-01-16 10:40:45,103 [5003306] INFO - .changes.ChangeListManagerImpl -
com.intellij.openapi.vcs.VcsException:
at git4idea.commands.GitCommandResult.throwOnError(GitCommandResult.java:155)
at git4idea.commands.GitCommandResult.getOutputOrThrow(GitCommandResult.java:144)
at git4idea.commands.GitImpl.untrackedFilesNoChunk(GitImpl.java:120)
at git4idea.commands.GitImpl.untrackedFiles(GitImpl.java:93)
at git4idea.repo.GitUntrackedFilesHolder.rescanAll(GitUntrackedFilesHolder.java:189)
at git4idea.repo.GitUntrackedFilesHolder.retrieveUntrackedFiles(GitUntrackedFilesHolder.java:172)
at git4idea.status.GitNewChangesCollector.collectUnversionedFiles(GitNewChangesCollector.java:116)
at git4idea.status.GitNewChangesCollector.<init>(GitNewChangesCollector.java:99)
at git4idea.status.GitNewChangesCollector.collect(GitNewChangesCollector.java:73)
at git4idea.status.GitChangeProvider.getChanges(GitChangeProvider.java:72)
at com.intellij.openapi.vcs.changes.ChangeListManagerImpl.actualUpdate(ChangeListManagerImpl.java:737)
at com.intellij.openapi.vcs.changes.ChangeListManagerImpl.iterateScopes(ChangeListManagerImpl.java:650)
at com.intellij.openapi.vcs.changes.ChangeListManagerImpl.lambda$updateImmediately$11(ChangeListManagerImpl.java:551)
at com.intellij.openapi.progress.impl.CoreProgressManager.lambda$runProcess$2(CoreProgressManager.java:164)
at com.intellij.openapi.progress.impl.CoreProgressManager.registerIndicatorAndRun(CoreProgressManager.java:582)
at com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:532)
at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:87)
at com.intellij.openapi.progress.impl.CoreProgressManager.runProcess(CoreProgressManager.java:151)
at com.intellij.openapi.vcs.changes.ChangeListManagerImpl.updateImmediately(ChangeListManagerImpl.java:550)
at com.intellij.openapi.vcs.changes.ChangeListManagerImpl.lambda$new$0(ChangeListManagerImpl.java:129)
at com.intellij.openapi.vcs.changes.UpdateRequestsQueue$MyRunnable.run(UpdateRequestsQueue.java:225)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at com.intellij.util.concurrency.SchedulingWrapper$MyScheduledFutureTask.run(SchedulingWrapper.java:228)
at com.intellij.util.concurrency.BoundedTaskExecutor.doRun(BoundedTaskExecutor.java:227)
at com.intellij.util.concurrency.BoundedTaskExecutor.access$100(BoundedTaskExecutor.java:26)
at com.intellij.util.concurrency.BoundedTaskExecutor$2$1.run(BoundedTaskExecutor.java:200)
at com.intellij.util.ConcurrencyUtil.runUnderThreadName(ConcurrencyUtil.java:229)
at com.intellij.util.concurrency.BoundedTaskExecutor$2.run(BoundedTaskExecutor.java:194)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)

```