Git script to reset local changes

resetToUpstream.sh

#!/usr/bin/env sh

currentFullName=$(git rev-parse --symbolic-full-name HEAD)
branch=$(git rev-parse --abbrev-ref $1)
branchFullName=$(git rev-parse --symbolic-full-name $branch)
upstream=$(git rev-parse --symbolic-full-name $branch@{upstream})

if [ $? -ne 0 ]
then
    exit # No tracked branch.
fi

if [ "$currentFullName" = "$branchFullName" ]
then
    git reset --soft $upstream
else
	git branch -f $branch $upstream
fi