Restrict tags to pureos namespace

This avoids build attempts when e.g. a developer
users the same key in Debian. The builds fail due
to the changelog not having the right distribution
but this prevents the attempts upfront.

blessed_build_auto.groovy

@@ -151,9 +151,9 @@ pkgs.each { pkg ->
                             checkout([
                                 changelog: true,
                                 poll: true,
-                                userRemoteConfigs: [[url: '${url}', refspec: '+refs/tags/*:refs/remotes/origin/tags/*']],
+                                userRemoteConfigs: [[url: '${url}', refspec: '+refs/tags/pureos/*:refs/remotes/origin/tags/pureos/*']],
                                     \$class: 'GitSCM',
-                                    branches: [[name: '**']],
+                                    branches: [[name: '**/tags/pureos/**']],
                                     extensions: [[\$class: 'RelativeTargetDirectory',
                                     relativeTargetDir: 'build'],
                                 ],