diff --git a/lib/tasks/changesets.rake b/lib/tasks/changesets.rake
new file mode 100644
index 000000000..db644838a
--- /dev/null
+++ b/lib/tasks/changesets.rake
@@ -0,0 +1,45 @@
+namespace :redmine do
+  namespace :changesets do
+    desc 'Sync all revisions in repositories related with all active project.'
+    task :reload => :environment do
+      Project.active.has_module(:repository).find_each do |project|
+        project.repositories.find_each do |repository|
+          detail = [
+            "PJ-ID #{repository.project_id}",
+            "Identifier #{repository.identifier}",
+            "URL #{repository.url}",
+          ].join(", ")
+          changesets = repository.changesets
+          puts("Sync revisions: #{changesets.count}: #{detail}")
+          latest_changeset = changesets.first
+          changeset = latest_changeset
+          while changeset
+            revisions = repository.scm.revisions(nil,
+                                                changeset.identifier,
+                                                changeset.identifier)
+            revisions.each do |revision|
+              changeset.committer =
+                Changeset.to_utf8(revision.author,
+                                  repository.repo_log_encoding)
+              changeset.comments =
+                Changeset.normalize_comments(revision.message,
+                                            repository.repo_log_encoding)
+              changeset.user =
+                repository.find_committer_user(changeset.committer)
+              next unless changeset.changed?
+              changeset.scan_for_issues
+              if changeset.save
+                puts("Sync revision: #{changeset.identifier}, #{detail}")
+              else
+                puts("Failed to sync revision: " +
+                    "#{changeset.identifier}, #{detail}: " +
+                    "#{changeset.errors}")
+              end
+            end
+            changeset = changeset.previous
+          end
+        end
+      end
+    end
+  end
+end
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