Git version of some common SVN hooks?

Hi,

I'm porting a large and active repository from SVN to Git.

To provide the developers with the same features, I need the Git version of the following common hooks:

1. svn2cl: the Subversion ChangeLog Generator. Basically a script that
sends a readable email listing a range of commits, showing just a
short summary for each commit: author name, timestamp, hash, paths
modified, commit message.
2. Hook to reject any commit containing a path with non-ASCII characters.
3. Hook to reject any commit causing the repository to contain two or
more paths that differ from each other only in letter case. For
instance, a commit adding foo/bar.py would be rejected if foo/Bar.py
was added as part of that same commit, or already existed in the repo.
4. Hook to trigger an action based on which path was committed to. For
example, if a developer commits into REPO_ROOT/foo, send an email to
address foo@somedomain, whereas a commit to REPO_ROOT/bar will send an
email to bar@somedomain.

I'm hoping there are Git versions of these hooks already written, but if now any leads about implementing them would be appreciated.

Our full setup btw is a large repository hosted on a local instance of Gitorious. All our users use Git >= 1.7, although they work on all 3 operating systems: Linux, OS X, Windows.

Thanks, D