git logにブランチ名を表示する git log --oneline --graph --decorate=fullのススメ ref: http://qiita.com/masarufuruya/items/7480854d4bc2f0443fc1

file0.txt

* commit 1235f58b72bd3323375debbc783a508d8328277cce5
| Author: Masaru Furuya
| Date:   Fri May 16 00:54:09 2014 +0900
| 
|     git test

file1.txt

* commit 2rr29dd167c5d38fec823f2c90fb4896536a6214
| Author: Masaru Furuya
| Date:   Thu May 15 19:22:14 2014 +0900
| 
|     
|    
*   commit 9003273439ba845614650688d7bb752614ec6231
|\  Merge: 90b2dd4 4034903
| | Author: Masaru Furuya
| | Date:   Thu May 15 18:32:17 2014 +0900
| | 
| |     Merge branch 'git_test2' into git_test
| |   
| * commit 1334fa8d01d0a17e679eb3b94a3db5479a144223

file2.txt

10029dd git test3
3453273 git test2
134bfa8 git test1

file3.txt

* 1ee29dd (HEAD, origin/git_test, origin/HEAD, git_test2, git_test) 
* *   1233273 Merge branch 'git_test2' into git_test
|\  
| * 135bfa8 git_test2
| *   111b0f1 git_test4 Merge branch 'git_test3'
| |\  
| |/  
|/|   
* | 01b2dd4 git_test

file4.txt

[alias]
graph=log --graph --oneline --decorate=full