Re: [PATCH v2] maintenance: add prune-remote-refs task

> diff --git a/Documentation/git-maintenance.txt b/Documentation/git-maintenance.txt
> index 6e6651309d3..8b3e496c8ef 100644
> --- a/Documentation/git-maintenance.txt
> +++ b/Documentation/git-maintenance.txt
> @@ -158,6 +158,26 @@ pack-refs::
>  	need to iterate across many references. See linkgit:git-pack-refs[1]
>  	for more information.
>  
> +prune-remote-refs::
> +	The `prune-remote-refs` task runs `git remote prune` on each remote
> +	repository registered in the local repository. This task helps clean
> +	up deleted remote branches, improving the performance of operations
> +	that iterate through the refs. See linkgit:git-remote[1] for more
> +	information. This task is disabled by default.
> ++
> +NOTE: This task is opt-in to prevent unexpected removal of remote refs
> +for users of git-maintenance. For most users, configuring `fetch.prune=true`

> +is a acceptable solution, as it will automatically clean up stale remote-tracking
> +branches during normal fetch operations. However, this task can be useful in
> +specific scenarios:
> ++
> +--
> +* When using selective fetching (e.g., `git fetch origin +foo:refs/remotes/origin/foo`)
> +  where `fetch.prune` would only affect refs that are explicitly fetched.
> +* When third-party tools might perform unexpected full fetches, and you want
> +  periodic cleanup independently of fetch operations.
> +--

> diff --git a/builtin/gc.c b/builtin/gc.c
> index 4ae5196aedf..329c764f300 100644
> --- a/builtin/gc.c
> +++ b/builtin/gc.c
> @@ -20,6 +20,7 @@
>  #include "lockfile.h"
>  #include "parse-options.h"
>  #include "run-command.h"
> +#include "remote.h"
>  #include "sigchain.h"
>  #include "strvec.h"
>  #include "commit.h"
> @@ -913,6 +914,30 @@ static int maintenance_opt_schedule(const struct option *opt, const char *arg,
>  	return 0;
>  }
>  
> +static int prune_remote(struct remote *remote, void *cb_data UNUSED)
> +{
> +	struct child_process child = CHILD_PROCESS_INIT;
> +
> +	if (!remote->url.nr)
> +		return 0;
> +
> +	child.git_cmd = 1;
> +	strvec_pushl(&child.args, "remote", "prune", remote->name, NULL);
> +
> +	return !!run_command(&child);
> +}
> +
> +static int maintenance_task_prune_remote(struct maintenance_run_opts *opts,
> +					 struct gc_config *cfg UNUSED)
> +{
> +	if (for_each_remote(prune_remote, opts)) {
> +		error(_("failed to prune remotes"));
> +		return 1;