diff --git a/lib/hoe/git.rb b/lib/hoe/git.rb
index 463d5c0..c51e70b 100644
--- a/lib/hoe/git.rb
+++ b/lib/hoe/git.rb
@@ -60,6 +60,18 @@ class Hoe #:nodoc:
         puts
       end
 
+      desc "Update the manifest with Git's file list. Use Hoe's excludes."
+      task "git:manifest" do
+        with_config do |config, _|
+          files = `git ls-files`.split "\n"
+          files.reject! { |f| f =~ config["exclude"] }
+
+          File.open "Manifest.txt", "w" do |f|
+            f.puts files.sort.join("\n")
+          end
+        end
+      end
+
       desc "Create and push a TAG " +
            "(default #{git_release_tag_prefix}#{version})."