Another window with (configurable) git log

[renkam]

I would like to have another window which present last few commits. Something like git log. Ideally it would take arguments and pass it to git log. Alternatively it could just exec system command and present its contents in the window.

Is this possible to do?
As a workaround I was thinking about opening another window in a hook callback. Which one would be best to use? Maybe it would be useful to add another one like: commitia_loaded?

[renkam]

@rhysd Please advise