post-checkout script to print the jira summary for the branch you're on if its named with a jira or the summary of the jira of the last commit on that branch.

post-checkout

#!/usr/bin/python 
import os
import sys 
import re 

branch_name = os.popen("git svn info | grep URL | awk -F '/' '{print $NF}'").read()
expr = re.compile("([A-Z]+-[0-9]+)") 
if expr.findall(branch_name):
    jira = expr.findall(branch_name)[0]
    os.system("jira-cli --oneline %s" % jira)
else:
    last_commit = os.popen("git log -n 1 --format='%s'").read()
    if expr.findall(last_commit):
        jira = expr.findall(last_commit)[0]
        os.system("jira-cli --oneline %s" % jira)