Migrate a git repo from one instance of Altassian Stash/BitBucket to another

migrate-repo.sh

#!/bin/sh
# Script to migrate git repos from one instance of Altassian Stash/BitBucket to another.
# Author: Jesse Lang | http://jesselang.com/
REPO=/tmp/migrate-repo-mirror-${USER}

if [ $# -lt 2 ]; then
  echo "usage: migrate-repo.sh <current-url> <new-url>"
  exit 1
fi

rm -rf ${REPO}
git clone --mirror ${1} ${REPO}

if [ $? -ne 0 ]; then
  exit 2
fi

# All pull-request refs must be removed before pushing to stash.
for REF in $(git show-ref |grep refs/pull-requests | cut -d' ' -f2); do
  git -C ${REPO} update-ref -d ${REF}

  if [ $? -ne 0 ]; then
    exit 3
  fi
done

git -C ${REPO} remote set-url origin ${2}
git -C ${REPO} push --mirror origin

if [ $? -ne 0 ]; then
  exit 4
fi