Many ASF projects use JIRA as an issue tracker (see JIRA at issues.apache.org). CouchDB is one such project which also happens to be the project selected for experimenting with Git at the ASF. Improving the community contribution workflow for the CouchDB project by demonstrating good integration JIRA and Git will help to ensure that the CouchDB Git experiment is deemed a success and ensure a low barrier to community contribution.
There is an INFRA ticket open to set up the Git plugin for JIRA (INFRA-4157).
The Cassandra project has some documentation and scripts to help managing patch series in JIRA and Git.