master 1
volatile 1
volatile 2
volatile 3
volatile 4
volatile 5
master 2: Squashed commit of the following:

commit 49762b73b987e589e760a87cf5350be1f85f652a
Author: Hiroki Horiuchi <x19290@gmail.com>
Date:   Mon Jan 6 17:37:24 2014 +0900

    volatile 5

commit 0697efb4873b892fd14ad6a24ded0e98aa09aa43
Author: Hiroki Horiuchi <x19290@gmail.com>
Date:   Mon Jan 6 17:37:23 2014 +0900

    volatile 4

commit 70f59eac8dfe770acdd045e5e3bbf170b5d56ab0
Author: Hiroki Horiuchi <x19290@gmail.com>
Date:   Mon Jan 6 17:37:22 2014 +0900

    volatile 3

commit ccb422eb4d53e9da9cf7c2bdaea72904844e2e6e
Author: Hiroki Horiuchi <x19290@gmail.com>
Date:   Mon Jan 6 17:37:21 2014 +0900

    volatile 2

commit 7da9d1fa5f4f2efce88af24ed216d9f0605ad4b3
Author: Hiroki Horiuchi <x19290@gmail.com>
Date:   Mon Jan 6 17:37:19 2014 +0900

    volatile 1
master 3: Merge branch 'tmp.2014-01-06'