簡単な使い方としては、git logと組みわせる方法があります。
$ git log --numstat
以下のようなログが出ます。
(https://android.googlesource.com/platform/frameworks/base のログの一つです)
commit 2237e1e7b636651f0ed1efacefa8aaccb21433ca
Author: Eric Fischer
Date: Wed Nov 2 15:14:43 2011 -0700
Import revised translations. DO NOT MERGE
Change-Id: I2f073cc6d62d757ba4e6565a0c7974ca9cecba4c
1 1 core/res/res/values-en-rGB/strings.xml
1 1 core/res/res/values-ru/strings.xml
5 5 core/res/res/values-sw/strings.xml
24 24 core/res/res/values-uk/strings.xml
2 2 packages/BackupRestoreConfirmation/res/values-sw/strings.xml
2 2 packages/SystemUI/res/values-af/strings.xml
1 1 packages/SystemUI/res/values-ru/strings.xml
8 8 packages/SystemUI/res/values-sw/strings.xml
1 1 packages/SystemUI/res/values-uk/strings.xml
この場合だとリソースのみの変更であることが一目でわかります。
またdiffとの組み合わせも便利です。
$ git diff android-2.2_r1 android-2.3.1_r1 --numstat
99 64 Android.mk
21 1 CleanSpec.mk
418795 0 api/9.xml
24489 1485 api/current.xml
0 31 awt/Android.mk
0 1354 awt/com/android/internal/awt/AndroidGraphics2D.java
0 96 awt/com/android/internal/awt/AndroidGraphicsConfiguration.java
0 87 awt/com/android/internal/awt/AndroidGraphicsFactory.java
0 274 awt/com/android/internal/awt/AndroidImageDecoder.java
0 536 awt/com/android/internal/awt/AndroidJavaBlitter.java
0 75 awt/com/android/internal/awt/AndroidNativeEventQueue.java
0 88 awt/com/android/internal/awt/AndroidWTK.java
0 52 awt/com/android/internal/awt/AwtFactory.java
0 66 awt/com/android/internal/awt/ImageOutputStreamWrapper.java
0 681 awt/java/awt/AWTEvent.java
0 47 awt/java/awt/AWTException.java
0 712 awt/java/awt/AWTKeyStroke.java
0 47 awt/java/awt/AWTListenerList.java
0 61 awt/java/awt/AWTPermission.java
0 39 awt/java/awt/ActiveEvent.java
0 166 awt/java/awt/Adjustable.java
0 352 awt/java/awt/AlphaComposite.java
0 2443 awt/java/awt/BasicStroke.java
0 195 awt/java/awt/BufferCapabilities.java
0 990 awt/java/awt/Color.java
