go mod clean cache

go mod clean -cache

1. go: The Go command-line tool.
2. mod: A subcommand that deals with modules, a collection of Go packages stored in a file tree with a go.mod file at its root.
3. clean: A command that performs module maintenance tasks, including removing files and directories that are no longer needed.
4. -cache: A flag indicating that the clean operation should target the module cache, which is a local cache storing downloaded dependencies.

The command go mod clean -cache is used to clean the module cache, removing any files or directories from the cache that are no longer necessary. This helps to free up disk space and ensures that the cache only contains the necessary dependencies for the current state of the modules in the project.