Pull git repo script with reset support

pull-repo.sh

#!/bin/sh

# Usage:
# ./pull-repo.sh /path/to/reponame [branchname =master]
#
# Logs:
# /var/log/gitbot/reponame.log

if [ ! -d "$1" ]; then
	echo "'$1' is not a directory!"
	echo "Usage:"
	echo "./pull-repo.sh /path/to/reponame [branchname =master]"
	exit 1
fi

if [ -z $2 ]; then
	BRANCH=master
else
	BRANCH=$2
fi

REPO_DIR=${1%/}
REPO_NAME=${REPO_DIR##*/}
LOG=/var/log/gitbot/$REPO_NAME.log
DATE=`date +%Y-%m-%d.%H:%M:%S`

echo "$DATE $REPO_NAME [$BRANCH] $REPO_DIR" >> $LOG

cd $REPO_DIR
#git pull origin $BRANCH 2>&1 >> $LOG
git fetch origin 2>&1 | grep $BRANCH | grep "(forced update)" >> $LOG 2>&1
if [[ $? -eq 0 ]]; then
	git reset --hard origin/$BRANCH >> $LOG 2>&1
	if [[ $? -eq 0 ]]; then
		echo Resetting brahch $BRANCH
	else
                echo Error resetting branch $BRANCH, see $LOG for details
                exit 1
        fi
else
	git pull origin $BRANCH >> $LOG 2>&1
	if [[ $? -eq 0 ]]; then
		echo Normal pull branch $BRANCH
	else
		echo Error pulling branch $BRANCH, see $LOG for details
		exit 1
	fi
fi