Reset git directory to a known state - no questions asked (have a simpler version? are you sure? what if you're in the middle of a rebase and have untracked files?)

reset_branch.sh

alias nuke-nuke-branch="nnuke_branch"
alias nuke-branch="nuke_branch"

function nuke_branch()
{
  if [ $# -eq 1 ]; then
    git clean -f -d
    git rebase --abort
    git branch -D tempbranch &> /dev/null
    find . -name "post-checkout" | xargs rm -rf
    git checkout -b tempbranch
    git fetch upstream
    git branch -D $1
    git checkout -b $1 --track upstream/$1
    git branch -D tempbranch
    git reset --hard HEAD
  fi
}