diff --git a/bots-common/gitea_utils.go b/bots-common/gitea_utils.go
index ebdca9b..9f3980c 100644
--- a/bots-common/gitea_utils.go
+++ b/bots-common/gitea_utils.go
@@ -34,6 +34,7 @@ import (
 	apiclient "src.opensuse.org/autogits/common/gitea-generated/client"
 	"src.opensuse.org/autogits/common/gitea-generated/client/notification"
 	"src.opensuse.org/autogits/common/gitea-generated/client/organization"
+	"src.opensuse.org/autogits/common/gitea-generated/client/issue"
 	"src.opensuse.org/autogits/common/gitea-generated/client/repository"
 	"src.opensuse.org/autogits/common/gitea-generated/client/user"
 	"src.opensuse.org/autogits/common/gitea-generated/models"
@@ -63,6 +64,10 @@ const (
 	ReviewStateUnknown models.ReviewStateType = ""
 )
 
+type GiteaComment interface {
+	AddComment(pr *models.PullRequest, comment string) (error)
+}
+
 type GiteaMaintainershipReader interface {
 	FetchMaintainershipFile(org, prjGit, branch string) ([]byte, string, error)
 	FetchMaintainershipDirFile(org, prjGit, branch, pkg string) ([]byte, string, error)
@@ -100,6 +105,7 @@ type GiteaRepoFetcher interface {
 }
 
 type Gitea interface {
+	GiteaComment
 	GiteaRepoFetcher
 	GiteaReviewRequester
 	GiteaReviewer
@@ -459,8 +465,15 @@ func (gitea *GiteaTransport) AddReviewComment(pr *models.PullRequest, state mode
 			transport.DefaultAuthentication,
 		)
 	*/
+	if err != nil {
+		return nil, err
+	}
 
-	/*	c, err := client.Issue.IssueCreateComment(
+	return c.Payload, nil
+}
+
+func (gitea *GiteaTransport) AddComment(pr *models.PullRequest, comment string) (error) {
+	_, err := gitea.client.Issue.IssueCreateComment(
 		issue.NewIssueCreateCommentParams().
 			WithDefaults().
 			WithOwner(pr.Base.Repo.Owner.UserName).
@@ -469,13 +482,13 @@ func (gitea *GiteaTransport) AddReviewComment(pr *models.PullRequest, state mode
 			WithBody(&models.CreateIssueCommentOption{
 				Body: &comment,
 			}),
-		transport.DefaultAuthentication)
-	*/
+		gitea.transport.DefaultAuthentication)
+
 	if err != nil {
-		return nil, err
+		return err
 	}
 
-	return c.Payload, nil
+	return nil
 }
 
 func (gitea *GiteaTransport) GetRepositoryFileContent(org, repo, hash, path string) ([]byte, string, error) {
diff --git a/obs-staging-bot/main.go b/obs-staging-bot/main.go
index 03d9002..faa616f 100644
--- a/obs-staging-bot/main.go
+++ b/obs-staging-bot/main.go
@@ -93,6 +93,14 @@ func getObsProjectAssociatedWithPr(baseProject string, pr *models.PullRequest) s
 func processBuildStatusUpdate() {
 }
 
+type RequestModification int
+
+const (
+	RequestModificationNoChange  = 1
+	RequestModificationProjectCreated   = 2
+	RequestModificationSourceChanged = 3
+)
+
 type BuildStatusSummary int
 
 const (
@@ -317,13 +325,13 @@ func generateObsPrjMeta(git common.Git, gitea common.Gitea, pr *models.PullReque
 	return meta, nil
 }
 
-func startOrUpdateBuild(git common.Git, gitea common.Gitea, pr *models.PullRequest, obsClient *common.ObsClient) error {
+func startOrUpdateBuild(git common.Git, gitea common.Gitea, pr *models.PullRequest, obsClient *common.ObsClient) (RequestModification, error) {
 	log.Println("fetching OBS project Meta")
 	obsPrProject := getObsProjectAssociatedWithPr(obsClient.HomeProject, pr)
 	meta, err := obsClient.GetProjectMeta(obsPrProject)
 	if err != nil {
 		log.Println("error fetching project meta for", obsPrProject, ":", err)
-		return err
+		return RequestModificationNoChange, err
 	}
 
 	if meta != nil {
@@ -334,28 +342,31 @@ func startOrUpdateBuild(git common.Git, gitea common.Gitea, pr *models.PullReque
 		} else {
 			if path.Fragment == pr.Head.Sha {
 				// build in progress
-				return nil
+				return RequestModificationNoChange, nil
 			}
 			// build needs update
 			log.Println("Detected Head update... regenerating build...")
 			meta = nil
 		}
 	}
+	var state RequestModification
+	state = RequestModificationSourceChanged
 	if meta == nil {
 		// new build
 		meta, err = generateObsPrjMeta(git, gitea, pr, obsClient)
 		if err != nil {
-			return err
+			return RequestModificationNoChange, err
 		}
+		state = RequestModificationProjectCreated
 	}
 
 	err = obsClient.SetProjectMeta(meta)
 	if err != nil {
 		log.Println("cannot create meta project:", err)
-		return err
+		return RequestModificationNoChange, err
 	}
 
-	return nil
+	return state, nil
 }
 
 func processPullNotification(gitea common.Gitea, thread *models.NotificationThread) {
@@ -454,25 +465,31 @@ func processPullNotification(gitea common.Gitea, thread *models.NotificationThre
 		}
 
 		log.Println("processing state...")
+		log.Println("processing state... %d", review.State)
+
 
 		switch review.State {
 
 		// create build project, if doesn't exist, and add it to pending requests
-		case common.ReviewStateUnknown, common.ReviewStateRequestReview:
-			if err := startOrUpdateBuild(git, gitea, pr, obsClient); err != nil {
+		case common.ReviewStateUnknown:
+			// what to do?
+
+
+		case common.ReviewStatePending, common.ReviewStateRequestReview:
+			change, err := startOrUpdateBuild(git, gitea, pr, obsClient)
+			if err != nil {
 				return
 			}
+			if change != RequestModificationNoChange {
+				msg := "Changed source updated for build"
+				if change == RequestModificationProjectCreated {
+					msg = "Build is started in https://" + obsWebHost + "/project/show/" +
+						getObsProjectAssociatedWithPr(obsClient.HomeProject, pr)
+				}
+				gitea.AddComment(pr, msg)
+		 	}
 
-			msg := "Build is started in https://" + obsWebHost + "/project/show/" +
-				getObsProjectAssociatedWithPr(obsClient.HomeProject, pr)
-			gitea.AddReviewComment(pr, common.ReviewStatePending, msg)
-
-		case common.ReviewStatePending:
-			if err := startOrUpdateBuild(git, gitea, pr, obsClient); err != nil {
-				return
-			}
-
-			err := fetchPrGit(git, pr)
+			err = fetchPrGit(git, pr)
 			if err != nil {
 				log.Println("Cannot fetch PR git:", pr.URL)
 				return