Git - separate folder for each branch. Setting it up

Question

I have a need to keep 3 branches in 3 separate folders. (I know this is not a git way of doing things. But I need to do this for a reason).

Lets say the repo name is

Answer 1

Here's a bash script to check out all remote branches into separate worktrees and then keep them in sync. Every time it runs it will throw away any local changes. It just tries to make the checked out code mirror the repo.

git fetch --all --prune

# reset branch only if it has deviated from the remote
function update_branch {
        if git diff --exit-code --quiet $1; then
                echo "No changes on branch $1"
        else
                echo "Resetting branch $1"
                git reset --hard $1
        fi
}

# master branch is checked out in the root
update_branch origin/master

# check out each remote branch into a subfolder
branches=$(git for-each-ref --format='%(refname:short)' refs/remotes/origin | grep -v /HEAD | grep -v /master)
for branch in $branches; do
        if [ -d $branch ]; then
                cd $branch
                update_branch $branch
                cd $OLDPWD
        else
                echo "Checking out new branch $branch"
                git worktree add $branch $branch
        fi
done

# check for branches that have been deleted on the remote
for branch in origin/*; do
        if ! git show-ref --verify refs/remotes/$branch --quiet; then
                echo "Removing worktree $branch"
                git worktree remove $branch
        fi
done

git worktree prune