see `hello.c` in your working tree with the former, but with the latter
you will.
+ * Just as the filesystem '.' (period) refers to the current directory,
+ using a '.' as a repository name in Git (a dot-repository) is a relative
+ path and means your current repository.
+
Here are the rules regarding the "flags" that you should follow when you are
scripting Git:
+
---------------------------------------------
$ git describe -h
-usage: git describe [options] <committish>*
+usage: git describe [options] <commit-ish>*
or: git describe [options] --dirty
--contains find the tag that comes after the commit