Simulate a checkout of a detached commit in the gitlab upstream

gitlab-force-checkout.sh

#!/bin/bash
#
# Simulate a checkout of a detached commit in the gitlab upstream
#
# Usage
#   $ gitlab-force-checkout COMMIT_HASH

set -e

if [ ! -z "$(git status --porcelain)" ]; then 
    echo "Please stash your changes before continue!"
    exit 1
fi

DOWNLOAD_DIR="${HOME}/Downloads"

GIT_UPSTREAM="$(git remote -v | grep push | awk '{print $2}' | awk -F @ '{print $2}' | tr ':' '/' | sed "s=.git==g")"
REPO_BASE_NAME="${GIT_UPSTREAM##*/}"

ARCHIVE_URL="https://${GIT_UPSTREAM}/-/archive/${1}"
ARCHIVE_FILE="${REPO_BASE_NAME}-${1}.zip"
gio open "${ARCHIVE_URL}/${ARCHIVE_FILE}" &

while :; do     
    sleep 2
    ARCHIVE_FILE_LOCAL="$(find "${DOWNLOAD_DIR}" -name "${ARCHIVE_FILE}")"
    if  [ ! -z "${ARCHIVE_FILE_LOCAL}" ]; then 
        break
    fi
done

TEMP_DIR="$(mktemp -d)"
unzip "${ARCHIVE_FILE_LOCAL}" -d "${TEMP_DIR}"

GIT_BASE_DIR="$(git rev-parse --show-toplevel)"

shopt -s extglob
eval rm -r "${GIT_BASE_DIR}/!(.git)"
cp -TR "${TEMP_DIR}/${REPO_BASE_NAME}-${1}/" "${GIT_BASE_DIR}/"
rm -r -f "${TEMP_DIR}"

git status