how to check the git history code example

Example 1: git log in command line pretty view

$ git log --graph --pretty=format:'%Cred%h%Creset -%C(yellow)%d%Creset %s %Cgreen(%cr) %C(bold blue)<%an>%Creset' --abbrev-commit

* 3396763 - (HEAD, origin/master, master) Add twitter link (4 days ago) <Mattias Geniar>
* c73bbc9 - add facebook link (6 days ago) <Mattias Geniar>
* cb555df - More random values (6 days ago) <Mattias Geniar>
*   60e7bbf - Merge pull request #1 from TSchuermans/patch-1 (7 days ago) <Mattias Geniar>
|\
| * 8044a8f - Typo fix (7 days ago) <Tom Schuermans>
|/

Example 2: check commit history git

$ git log
commit ca82a6dff817ec66f44342007202690a93763949
Author: Scott Chacon <[email protected]>
Date:   Mon Mar 17 21:52:11 2008 -0700

    Change version number

commit 085bb3bcb608e1e8451d4b2432f8ecbe6306e7e7
Author: Scott Chacon <[email protected]>
Date:   Sat Mar 15 16:40:33 2008 -0700

    Remove unnecessary test

commit a11bef06a3f659402fe7563abf99ad00de2209e6
Author: Scott Chacon <[email protected]>
Date:   Sat Mar 15 10:31:28 2008 -0700

    Initial commit