Many Git optimizations are relatively new and not available in older versions of the software. For macOS, we recommend to use [brew install git](https://git-scm.com/download/mac). For other operating systems, see the [Git documentation](https://git-scm.com/book/en/v2/Getting-Started-Installing-Git) for instructions.
- Git [sparse checkout](../reference/git_optimization.md) is used to clone only the ["skeleton" folders](../reference/skeleton_folders.md), which includes all workspace **package.json** files, but excludes the source code subfolders.
The `--to` [project selector](https://rushjs.io/pages/developer/selecting_subsets/#--to) instructs Sparo to checkout all dependencies in the workspace that are required to build `my-rush-project`.
👉 _If you're demoing **azure-sdk-for-js**, replace `my-rush-project` with `@azure/arm-commerce`._
### Step 4: Check out your Sparo profile
The `--profile` parameter can be included with `sparo checkout` (and in the future also `sparo clone` and `sparo pull`). This parameter specifies the name of the JSON file to be selected. You can also combine multiple profiles (`sparo checkout --profile p1 --profile p2`), in which case the union of their selections will be used. (Combining profiles is an advanced scenario, but useful for example if your pull request will impact sets of projects belonging to multiple teams.)
**Sparse checkout based on common/sparo-profiles/my-team.json**
```shell
sparo checkout --profile my-team
```
**Behind the scenes:**
- Sparo automatically generates the `$GIT_DIR/info/sparse-checkout` configuration automatically based on your profile selections. To avoid conflicts, while using Sparo do not edit this file directly or rewrite it using other tools such as `git sparse-checkout`.
- To checkout just the skeleton (returning to the initial state from Step 1 where no profile is chosen yet), specify `--no-profile` instead of `--profile NAME`.
- To add more profiles, combining with your existing selection, use `--add-profile NAME` instead of `--profile NAME`. For example, these two commands produce the same result as `sparo checkout --profile p1 --profile p2`:
For everyday work, consider choosing [mirrored subcommands](../commands/overview.md) such as `sparo revert` instead of `git revert`. The Sparo wrapper provides (1) better defaults, (2) suggestions for better performance, and (3) optional anonymized performance metrics.