why match is undefined at the last line of the program?

branches-head-dates.coffee

#!/usr/bin/env coffee

fs = require 'fs'
spawn = (require 'child_process').spawn

log = console.log
data = fs.readFileSync '.git/FETCH_HEAD', 'utf8'
for ln in data.split /\n/
   match = /(.{40}).*?branch '(.*)'/.exec ln
   continue unless match
   args =  "log -1 --format=%cd #{match[1]}".split /\s+/ 
   fun = ->
     branchNm = match[2]
     git = spawn 'git', args
     git.stdout.on 'data', (data) ->  log "#{data.toString 'utf8', 0, data.length-1}  #{branchNm}"
   fun()

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The problem is that scope in javascript is function and not loop. So I have to create a function to capture the branch name
at each iteration of the loop.
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