Git note (TBD)

it's a note based on:
Git Book

Ch6 - Tools:

1. $ git log --abbrev-commit
   : Simplified SHA-1 (Shortest to it's '消歧意' length)
2. $ git show ca82a6dff817ec66f44342007202690a93763949
   $ git show topic1
   : Both for the same meaning, for query branch detail.
3. $ git rev-parse topic1
   ca82a6dff817ec66f44342007202690a93763949
   :To check work status. Used for Git plumbing.
4. $ git reflog
   : Record the 'HEAD' flow, along with branching history.
5. 需要注意的是，日誌引用資訊只存在於本地——這是一個你在倉庫裡做過什麼的日誌。這些引用不會和其他人的倉庫拷貝裡的相同；當你新 clone 一個倉庫的時候，引用日誌是空的，因為你在倉庫裡還沒有操作。
6. $ git log --pretty=format:'%h %s' --graph
   * 734713b fixed refs handling, added gc auto, updated tests
   * d921970 Merge commit 'phedders/rdocs'
   |\
   | * 35cfb2b Some rdoc changes
   * | 1c002dd added some blame and merge stuff
   |/
   * 1c36188 ignore *.gem
   * 9b29157 add open3_detach to gemspec file list
   : 圖形化的log 方式
7. $ git log master..experiment
   D
   C
   : Check for the branches that only 'experiment' have.
   
8. $ git log experiment..master
   F
   E
   : As the contrary for upper usage.
9. $ git stash
   : Want to change your HEAD branch without commit those changes you having done yet with the last branch directory.
   你想切換分支，但是你還不想提交你正在進行中的工作；所以你儲藏這些變更。
10. $ git stash list
    : To check those you stashed
11. $ git blame -L 12,22 simplegit.rb
    : To take a look at modification(by whom) of each line.
12. $ git bisect bad
    $ git bisect good
    : Mark the file status good/bad that 'binary search-able' 
13.