revert unnecessary change

Author: lunny

services/repository/commitstatus/commitstatus.go

@@ -14,6 +14,7 @@ import (
 	repo_model "code.gitea.io/gitea/models/repo"
 	user_model "code.gitea.io/gitea/models/user"
 	"code.gitea.io/gitea/modules/cache"
+	"code.gitea.io/gitea/modules/git"
 	"code.gitea.io/gitea/modules/gitrepo"
 	"code.gitea.io/gitea/modules/json"
 	"code.gitea.io/gitea/modules/log"
@@ -77,10 +78,16 @@ func CreateCommitStatus(ctx context.Context, repo *repo_model.Repository, creato
 	}
 	defer closer.Close()
 
+	objectFormat := git.ObjectFormatFromName(repo.ObjectFormatName)
+
 	commit, err := gitRepo.GetCommit(sha)
 	if err != nil {
 		return fmt.Errorf("GetCommit[%s]: %w", sha, err)
 	}
+	if len(sha) != objectFormat.FullLength() {
+		// use complete commit sha
+		sha = commit.ID.String()
+	}
 
 	if err := db.WithTx(ctx, func(ctx context.Context) error {
 		if err := git_model.NewCommitStatus(ctx, git_model.NewCommitStatusOptions{