Print meta in list command

It'd be better if we can show metadata like commit time.

We can get such information in git by the following command.
```
$ git show --q --format="%cn DELIM %ct DELIM %ce" d85a5ebbc9a12fe3966adfa65c420e8ad8051e2b 4d7c5f98b43266accc13bdbc8f144ce72acbdd45
Daisuke Taniwaki DELIM 1549160926 DELIM daisuketaniwaki@gmail.com
Daisuke Taniwaki DELIM 1549126419 DELIM daisuketaniwaki@gmail.com
```