Use gitRepo as parameter instead of repopath when invoking sign functions (#36162)

Co-authored-by: Giteabot <teabot@gitea.io>

services/repository/files/cherry_pick.go

@@ -12,6 +12,7 @@ import (
 	repo_model "code.gitea.io/gitea/models/repo"
 	user_model "code.gitea.io/gitea/models/user"
 	"code.gitea.io/gitea/modules/git"
+	"code.gitea.io/gitea/modules/gitrepo"
 	"code.gitea.io/gitea/modules/log"
 	"code.gitea.io/gitea/modules/structs"
 	"code.gitea.io/gitea/services/pull"
@@ -35,7 +36,13 @@ func (err ErrCommitIDDoesNotMatch) Error() string {
 
 // CherryPick cherry-picks or reverts a commit to the given repository
 func CherryPick(ctx context.Context, repo *repo_model.Repository, doer *user_model.User, revert bool, opts *ApplyDiffPatchOptions) (*structs.FileResponse, error) {
-	if err := opts.Validate(ctx, repo, doer); err != nil {
+	gitRepo, closer, err := gitrepo.RepositoryFromContextOrOpen(ctx, repo)
+	if err != nil {
+		return nil, err
+	}
+	defer closer.Close()
+
+	if err := opts.Validate(ctx, repo, gitRepo, doer); err != nil {
 		return nil, err
 	}
 	message := strings.TrimSpace(opts.Message)