Use the type RefName for all the needed places and fix pull mirror sync bugs (#24634)

This PR replaces all string refName as a type `git.RefName` to make the
code more maintainable.

Fix #15367
Replaces #23070 
It also fixed a bug that tags are not sync because `git remote --prune
origin` will not remove local tags if remote removed.

We in fact should use `git fetch --prune --tags origin` but not `git
remote update origin` to do the sync.

Some answer from ChatGPT as ref.

> If the git fetch --prune --tags command is not working as expected,
there could be a few reasons why. Here are a few things to check:
> 
>Make sure that you have the latest version of Git installed on your
system. You can check the version by running git --version in your
terminal. If you have an outdated version, try updating Git and see if
that resolves the issue.
> 
>Check that your Git repository is properly configured to track the
remote repository's tags. You can check this by running git config
--get-all remote.origin.fetch and verifying that it includes
+refs/tags/*:refs/tags/*. If it does not, you can add it by running git
config --add remote.origin.fetch "+refs/tags/*:refs/tags/*".
> 
>Verify that the tags you are trying to prune actually exist on the
remote repository. You can do this by running git ls-remote --tags
origin to list all the tags on the remote repository.
> 
>Check if any local tags have been created that match the names of tags
on the remote repository. If so, these local tags may be preventing the
git fetch --prune --tags command from working properly. You can delete
local tags using the git tag -d command.

---------

Co-authored-by: delvh <dev.lh@web.de>

1 files changed, 2 insertions, 8 deletions

diff --git a/routers/api/actions/runner/utils.go b/routers/api/actions/runner/utils.go
index 10f92c29f7..77e660026a 100644
--- a/routers/api/actions/runner/utils.go
+++ b/routers/api/actions/runner/utils.go
@@ -98,14 +98,8 @@ func generateTaskContext(t *actions_model.ActionTask) *structpb.Struct {
 		baseRef = pullPayload.PullRequest.Base.Ref
 		headRef = pullPayload.PullRequest.Head.Ref
 	}
-	refPrefix, refName := git.SplitRefName(t.Job.Run.Ref)
-	refType := ""
-	switch refPrefix {
-	case git.BranchPrefix:
-		refType = "branch"
-	case git.TagPrefix:
-		refType = "tag"
-	}
+	refName := git.RefName(t.Job.Run.Ref)
+	refType := refName.RefGroup()
 
 	taskContext, _ := structpb.NewStruct(map[string]interface{}{
 		// standard contexts, see https://docs.github.com/en/actions/learn-github-actions/contexts#github-context