Exception using eGit and clicking "Assume changed"

java.io.IOException: File is too large: /Users/andrew/NonEclipse/spring-ide/.git/FETCH_HEAD
	at org.eclipse.jgit.util.IO.readFully(IO.java:100)
	at org.eclipse.jgit.storage.file.RefDirectory.scanRef(RefDirectory.java:844)
	at org.eclipse.jgit.storage.file.RefDirectory.readRef(RefDirectory.java:816)
	at org.eclipse.jgit.storage.file.RefDirectory.getRef(RefDirectory.java:264)
	at org.eclipse.jgit.storage.file.RefDirectory.getAdditionalRefs(RefDirectory.java:316)
	at org.eclipse.egit.ui.internal.repository.RepositoriesViewContentProvider.getChildren(RepositoriesViewContentProvider.java:268)
	at org.eclipse.ui.internal.navigator.extensions.SafeDelegateTreeContentProvider.getChildren(SafeDelegateTreeContentProvider.java:96)
	at org.eclipse.ui.internal.navigator.extensions.SafeDelegateTreeContentProvider.getChildren(SafeDelegateTreeContentProvider.java:275)
	at org.eclipse.ui.internal.navigator.extensions.SafeDelegateTreeContentProvider.getChildren(SafeDelegateTreeContentProvider.java:94)
	at org.eclipse.ui.internal.navigator.NavigatorContentServiceContentProvider$1.run(NavigatorContentServiceContentProvider.java:150)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
	at org.eclipse.ui.internal.navigator.NavigatorContentServiceContentProvider.internalGetChildren(NavigatorContentServiceContentProvider.java:137)
	at org.eclipse.ui.internal.navigator.NavigatorContentServiceContentProvider.getChildren(NavigatorContentServiceContentProvider.java:123)
	at org.eclipse.jface.viewers.AbstractTreeViewer.getRawChildren(AbstractTreeViewer.java:1348)
	at org.eclipse.jface.viewers.TreeViewer.getRawChildren(TreeViewer.java:391)
	at org.eclipse.jface.viewers.StructuredViewer.getFilteredChildren(StructuredViewer.java:896)
	at org.eclipse.jface.viewers.AbstractTreeViewer.getSortedChildren(AbstractTreeViewer.java:601)
	at org.eclipse.jface.viewers.AbstractTreeViewer.updateChildren(AbstractTreeViewer.java:2579)
	at org.eclipse.jface.viewers.AbstractTreeViewer.internalRefreshStruct(AbstractTreeViewer.java:1867)
	at org.eclipse.jface.viewers.TreeViewer.internalRefreshStruct(TreeViewer.java:721)
	at org.eclipse.jface.viewers.AbstractTreeViewer.internalRefreshStruct(AbstractTreeViewer.java:1874)
	at org.eclipse.jface.viewers.TreeViewer.internalRefreshStruct(TreeViewer.java:721)
	at org.eclipse.jface.viewers.AbstractTreeViewer.internalRefreshStruct(AbstractTreeViewer.java:1874)
	at org.eclipse.jface.viewers.TreeViewer.internalRefreshStruct(TreeViewer.java:721)
	at org.eclipse.jface.viewers.AbstractTreeViewer.internalRefresh(AbstractTreeViewer.java:1842)
	at org.eclipse.jface.viewers.AbstractTreeViewer.internalRefresh(AbstractTreeViewer.java:1799)
	at org.eclipse.ui.navigator.CommonViewer.internalRefresh(CommonViewer.java:561)
	at org.eclipse.jface.viewers.StructuredViewer$8.run(StructuredViewer.java:1514)
	at org.eclipse.jface.viewers.StructuredViewer.preservingSelection(StructuredViewer.java:1422)
	at org.eclipse.jface.viewers.TreeViewer.preservingSelection(TreeViewer.java:403)
	at org.eclipse.jface.viewers.StructuredViewer.preservingSelection(StructuredViewer.java:1383)
	at org.eclipse.jface.viewers.StructuredViewer.refresh(StructuredViewer.java:1512)
	at org.eclipse.jface.viewers.ColumnViewer.refresh(ColumnViewer.java:548)
	at org.eclipse.ui.navigator.CommonViewer.refresh(CommonViewer.java:353)
	at org.eclipse.ui.navigator.CommonViewer.refresh(CommonViewer.java:510)
	at org.eclipse.jface.viewers.StructuredViewer.refresh(StructuredViewer.java:1444)
	at org.eclipse.egit.ui.internal.repository.RepositoriesView$8$1.run(RepositoriesView.java:454)
	at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
	at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:134)
	at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:3593)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3286)
	at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2640)
	at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2604)
	at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2438)
	at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:671)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:664)
	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:115)
	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:369)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:620)
	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:575)
	at org.eclipse.equinox.launcher.Main.run(Main.java:1408)