Specify a reference that differentiates this project, for example, a branch name or version. Projects having the same reference can be grouped based on that reference. Ignores applied on monitored project with a particular target reference will only apply on test with a matching reference.

For more information see [Group projects by branch or version for monitoring](https://docs.snyk.io/snyk-cli/scan-and-maintain-projects-using-the-cli/group-projects-by-branch-or-version-for-monitoring)