Fleet command multi clone

### Describe the feature or problem you'd like to solve

In order to not squash file changes, clone repo to multiple directories and have git as the communication mechanism

### Proposed solution

Allow /fleet to clone the repository multiple times and rely on git functions to handle file conflicts and file squash incidents.

### Example prompts or workflows

_No response_

### Additional context

_No response_

Start by tracing the /fleet command and its existing repository-cloning workflow. Determine how multiple clone directories and git-based communication should fit the current behavior; the work is done when /fleet can manage multiple clones without squashing file changes or leaving conflicts ambiguous.

Written by the indexing model from the issue text.