gitpkg: Support '?signed'

roles/archbuild/files/gitpkg

@@ -174,6 +174,7 @@ class Repo
   def self.split_src(src)
     name, url = src =~ /::/ ? src.split("::", 2) : [nil, src.dup]
     url.sub!(/#.*/, "")
+    url.sub!(/\?signed/, "")
     url.sub!(/^git\+/, "")
     [name, url]
   end