Run one or more maintenance tasks. If one or more --task options are specified, then those tasks are run in that order. Otherwise, the tasks are determined by which maintenance.<task>.enabled config options are true. By default, only maintenance.gc.enabled is true.

The commit-graph job updates the commit-graph files incrementally, then verifies that the written data is correct. The incremental write is safe to run alongside concurrent Git processes since it will not expire .graph files that were in the previous commit-graph-chain file. They will be deleted by a later run based on the expiration delay.

Clean up unnecessary files and optimize the local repository. "GC" stands for "garbage collection," but this task performs many smaller tasks. This task can be expensive for large repositories, as it repacks all Git objects into a single pack-file. It can also be disruptive in some situations, as it deletes stale data. See git-gc[1] for more details on garbage collection in Git.

When combined with the run subcommand, run maintenance tasks only if certain thresholds are met. For example, the gc task runs when the number of loose objects exceeds the number stored in the gc.auto config setting, or when the number of pack-files exceeds the gc.autoPackLimit config setting.

Do not report progress or other information over stderr.

If this option is specified one or more times, then only run the specified tasks in the specified order. If no --task=<task> arguments are specified, then only the tasks with maintenance.<task>.enabled configured as true are considered. See the TASKS section for the list of accepted <task> values.