GIT plugin for Jira (issue tracker)

I was curious if anyone has created a GIT plugin for the Jira issue
tracker?  I have come across a mercurial plugin.  I have an idea that
I could nightly track our GIT repository with mercurial then I could
use the mercurial plugin with Jira.  But I wanted to check first on
the existence of a GIT plugin for Jira.[1]

Thanks,

Sean

[1]  http://www.atlassian.com/software/jira/

--