git  log 的用法，具体参考 git log --help，以下是个人在使用中遇见的问题，略作统计。

查看单个文件的修改差异（类似于查看单个文件的log，同时将每次log 的详细记录都显示出来）：

        --full-diff
Without this flag, git log -p <path>... shows commits that touch the specified paths, and diffs about the same specified paths. With this, the full diff is shown for commits that touch the specified paths; this means that "<path>…" limits only commits, and doesn’t limit diff for those commits.

$ git log -p  <path>... test.c
$ git log -u  <path>... test.c
$ git log -patch  <path>... test.c

$ git log -p --stat <path>...test.c