Steps to reproduce

Descriptions provided in the comments below

List of issues to be resolved:

• Confirm that a source mirror can be generated with sparse path packages git_fetch: make sparse path mirror projections unique #51080
  - [ ] Add make patches unique to the package for when sparse path packages share a single source directory

Error message

No response

Information on your system

Not platform specific, since sparse checkout was implemented.

General information

• I have run spack debug report and reported the version of Spack/Python/Platform
• I have searched the issues of this repo and believe this is not a duplicate
• I have run the failing commands in debug mode and reported the output