Git tag: pre-receive hook issue

We have a pre-receive hook that checks for JIRA ID whenever someone pushes
code to Git server. I'm trying to avoid this check when someone is applying
a tag. Here's the link for the script: http://pastebin.com/VnMQp5ar

This is the link for output: http://pastebin.com/tBGmYaZF

Problem is that if i run the following command, the output that i get on
command line is 0

git describe --exact-match ac28ca721e67adc04078786164939989a5112d98 2>&1 |
grep -o fatal | wc -w

So i'm wondering why it's not entering the IF block (as confirmed in the
output link)

I agree this is a bad implementation (and i will change it soon) for
checking tags and can be easily done by just checking whether $refname
starts with refs/tags/ but i'll really appreciate if someone could tell me
the mistake i'm committing. I've spent few hours banging my head on this.



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