* when don't have a task:
    r[year-month-day]
    example: r18-06-25
* have a task
    task_id
    example: task_123

* when don't have a task:
    h[day-hour-minute]
    example: h23-18-32 
* have a task
    task_id
    example: task_333

* when don't have a task
    f[year-month-day-name]
    example: f18-06-25-name_of_fixture
* have a task
    task_id
    example: task_123234

* with task
Finish feature: task_id
Message for commit

* without task
Finish feature
Message for commit

* with task
Finish hotfix: task_id
Message for commit

* without task
Finish hotfix.
Message for commit

* with task
Finish release: task_id
Commit message

* without task
Finish release.
Commit message