kmx.io/rbpkg

diff --git a/bin/rbpkg b/bin/rbpkg
index 6deff23..9e4db14 100755
--- a/bin/rbpkg
+++ b/bin/rbpkg
@@ -51,6 +51,8 @@ def rbpkg(args)
     Rbpkg.git_clone(args[1..])
   when "clean-sources"
     Rbpkg.clean_sources(args[1..])
+  when "fetch"
+    Rbpkg.fetch(args[1..])
   when "info"
     Rbpkg.info(args[1..])
   else
diff --git a/lib/rbpkg.rb b/lib/rbpkg.rb
index c56e8ee..326bfa8 100644
--- a/lib/rbpkg.rb
+++ b/lib/rbpkg.rb
@@ -24,6 +24,12 @@ module Rbpkg
     end
   end
 
+  def self.fetch(repos)
+    repos.each do |name|
+      Repos.repo(name).fetch()
+    end
+  end
+
   def self.git_clone(repos)
     repos.each do |name|
       Repos.repo(name).git_clone()
diff --git a/lib/rbpkg/repo.rb b/lib/rbpkg/repo.rb
index 5484800..1a47dba 100644
--- a/lib/rbpkg/repo.rb
+++ b/lib/rbpkg/repo.rb
@@ -15,6 +15,11 @@ class Rbpkg::Repo
     "#{File.basename(File.dirname(git_url))}/#{name}"
   end
 
+  def fetch
+    raise "must clone first" unless File.directory?(src_dir)
+    cmd "cd #{sh_quote(src_dir)} && git fetch"
+  end
+
   def git_clone
     if File.directory?(src_dir)
       false