fix exceptional case for git-tr to use local branch name as remote

Author: garryyao

git-origin.js

@@ -9,9 +9,10 @@ var ret = exec('git rev-parse --abbrev-ref --symbolic-full-name ' + branch + '@{
 });
 // no tracking branch on remote
 if (ret.code) {
+  // use the first remote listed
   echo(exec('git remote', {
     silent: 1
   }).output.split('\n')[0]);
 } else {
   echo(/[^\s]+?(?=\/)/.exec(ret.output)[0]);
-}
+}

git-tr.js

@@ -7,9 +7,11 @@ var branch = process.argv[2] || exec('git br', {
 var ret = exec('git rev-parse --abbrev-ref --symbolic-full-name ' + branch + '@{u}', {
   silent: 1
 });
+
 if (ret.code) {
-  echo('remote tracking branch NOT found');
-  exit(1);
-} else {
+  // use the same local branch name for remote.
+  echo(exec('git origin', {silent: 1}).output.trim() + '/' + branch);
+}
+else {
   echo(ret.output);
-}
+}