fix: expand git-ref to the full commit sha
fix: expand git-ref to the full commit sha

If using a branch, git commands that interact with worktrees may fail for newer versions of git.

claytonbrown/dokku,dokku/dokku,progrium/dokku,claytonbrown/dokku,progrium/dokku,claytonbrown/dokku,dokku/dokku,claytonbrown/dokku,dokku/dokku,dokku/dokku,claytonbrown/dokku,dokku/dokku,claytonbrown/dokku,progrium/dokku,progrium/dokku,progrium/dokku,progrium/dokku,dokku/dokku,dokku/dokku,claytonbrown/dokku,progrium/dokku,claytonbrown/dokku,progrium/dokku,dokku/dokku