diff --git a/README.md b/README.md
index 0328b66..b0c019e 100644
--- a/README.md
+++ b/README.md
@@ -145,6 +145,9 @@ forges:
     - Directory: /var/lib/other-modules
     - Source: /var/code/puppetlabs-apache
     - Proxy: http://forge.puppetlabs.com
+    - GitRepository:
+        source:       https://github.com/puppetlabs/puppetlabs-stdlib.git
+        include_tags: '[0-9.]+'
 ```
 
 ## Running with Phusion Passenger (EXPERIMENTAL)
diff --git a/lib/puppet_library/forge/git_repository.rb b/lib/puppet_library/forge/git_repository.rb
index f81f957..0ab9988 100644
--- a/lib/puppet_library/forge/git_repository.rb
+++ b/lib/puppet_library/forge/git_repository.rb
@@ -56,9 +56,11 @@ def self.configure(&block)
 
         # * <tt>:source</tt> - The URL or path of the git repository
         # * <tt>:version_tag_regex</tt> - A regex that describes which tags to serve
-        def initialize(git, version_tag_regex)
+        def initialize(source, version_tag_regex)
             super(self)
-            @version_tag_regex = version_tag_regex
+            @version_tag_regex = Regexp.new version_tag_regex[1]
+            cache_dir = PuppetLibrary::Util::TempDir.new("git-repo-cache")
+            git = PuppetLibrary::Util::Git.new(source[1], cache_dir)
             @git = git
             @metadata_cache = PuppetLibrary::Http::Cache::InMemory.new(60)
             @tags_cache = PuppetLibrary::Http::Cache::InMemory.new(60)
@@ -105,7 +107,7 @@ def get_metadata(author, module_name)
         def tags
             @tags_cache.get do
                 tags = @git.tags
-                tags = tags.select {|tag| tag =~ @version_tag_regex }
+                tags = tags.select {|tag| @version_tag_regex =~ tag }
                 tags = tags.select do |tag|
                     @git.file_exists?("metadata.json", tag) || @git.file_exists?("Modulefile", tag)
                 end