for value in data['actions']:
    if 'remoteUrls' in value:
        url = value['remoteUrls']
        ref = value['lastBuiltRevision']['SHA1']
        new_dict['url'] = url
        new_dict['ref'] = ref
        print new_dict

{vcs1: {'url': [u'ssh://abc.com:29418/abc.git'], 'ref': u'194d4c418c71f77355117bd253cf2ac9849b25dd'}, vcs2: {'url': [u'ssh://def:29418/def.git'], 'ref': u'7a198bf01b73330c379cc54aae1631f4448a4b0b'}}