Example (Part 1)¶

The command git log --pretty=fuller displays the Git log with both, author and committer.

$ git log --pretty=fuller

commit 9031f50a6dce130fce991a28940e8c80574b8ff1
Author:     Developer1 <developer1 at me dot com>
AuthorDate: Fri May 20 15:18:06 2016 +0200
Commit:     Developer1 <developer1 at me dot com>
CommitDate: Fri May 20 15:18:06 2016 +0200

    Changes, which were just committed a single time by Developer1.

commit a46cac0249a0cfb3dc018148e7ce62d55760d565
Author:     Developer1 <developer1 at me dot com>
AuthorDate: Fri May 18 12:10:36 2016 +0200
Commit:     Developer1 <developer1 at me dot com>
CommitDate: Fri May 20 15:16:06 2016 +0200

    Changes, which where first committed by Developer1 and afterwards changed and recommitted
    (using "git commit --amend") by Developer1 and thereby modifying the first commit.

commit adeecde1f380ac64a4b1e9828cc114aa08e3a6a1
Author:     Developer2 <developer2 at me dot com>
AuthorDate: Mon Apr 25 11:19:42 2016 +0200
Commit:     Developer1 <developer1 at me dot com>
CommitDate: Thu May 16 16:08:37 2016 +0200

    Changes, which where originally (locally) committed and afterwards extracted as patch
    (using "git format-patch") by Developer2 and then applied to the current Git repository
    (using "git am") by Developer1.

In general, author and committer are the same, as displayed for the newest commit (9031f50a).
They can be the same but have different dates associated with them, as displayed in the middle commit (a46cac02).
But they can even be different, as displayed in the oldest commit (adeecde1).

Example (Part 2)¶

Addressing the commits from "Example (Part 1) from above, this is no problem for the newest commit (9031f50a), as author and committer are the same as are their associated dates.

Revision 9031f50a
Added by Developer1 42 minutes ago

Changes, which were just committed a single time by Developer1.

For the middle commit (a46cac02) this is wrong but could be interpreted as the committer and its commit-date.

Revision a46cac02
Added by Developer1 44 minutes ago

Changes, which where first committed by Developer1 and afterwards changed and recommitted
(using "git commit --amend") by Developer1 and thereby modifying the first commit.

But for the oldest commit (adeecde1) this is totally wrong, as it displays the author with the commit-date.

Revision adeecde1
Added by Developer2 4 days ago

Changes, which where originally (locally) committed and afterwards extracted as patch
(using "git format-patch") by Developer2 and then applied to the current Git repository
(using "git am") by Developer1.