diff --git a/models/issues/pull.go b/models/issues/pull.go
index 5fe95d56cc2..4a5782f836c 100644
--- a/models/issues/pull.go
+++ b/models/issues/pull.go
@@ -268,6 +268,10 @@ func (pr *PullRequest) LoadAttributes(ctx context.Context) (err error) {
 	return nil
 }
 
+func (pr *PullRequest) IsAgitFlow() bool {
+	return pr.Flow == PullRequestFlowAGit
+}
+
 // LoadHeadRepo loads the head repository, pr.HeadRepo will remain nil if it does not exist
 // and thus ErrRepoNotExist will never be returned
 func (pr *PullRequest) LoadHeadRepo(ctx context.Context) (err error) {
diff --git a/options/locale/locale_en-US.ini b/options/locale/locale_en-US.ini
index 957e73b171d..f77fd203a2d 100644
--- a/options/locale/locale_en-US.ini
+++ b/options/locale/locale_en-US.ini
@@ -1927,6 +1927,7 @@ pulls.delete.text = Do you really want to delete this pull request? (This will p
 pulls.recently_pushed_new_branches = You pushed on branch <strong>%[1]s</strong> %[2]s
 
 pull.deleted_branch = (deleted):%s
+pull.agit_documentation = Review documentation about AGit
 
 comments.edit.already_changed = Unable to save changes to the comment. It appears the content has already been changed by another user. Please refresh the page and try editing again to avoid overwriting their changes
 
diff --git a/routers/web/repo/pull.go b/routers/web/repo/pull.go
index 95299b44d5a..ced0bbc15a0 100644
--- a/routers/web/repo/pull.go
+++ b/routers/web/repo/pull.go
@@ -164,7 +164,19 @@ func setMergeTarget(ctx *context.Context, pull *issues_model.PullRequest) {
 		ctx.Data["HeadTarget"] = pull.MustHeadUserName(ctx) + "/" + pull.HeadRepo.Name + ":" + pull.HeadBranch
 	}
 	ctx.Data["BaseTarget"] = pull.BaseBranch
-	ctx.Data["HeadBranchLink"] = pull.GetHeadBranchLink(ctx)
+	headBranchLink := ""
+	if pull.Flow == issues_model.PullRequestFlowGithub {
+		b, err := git_model.GetBranch(ctx, ctx.Repo.Repository.ID, pull.HeadBranch)
+		switch {
+		case err == nil:
+			if !b.IsDeleted {
+				headBranchLink = pull.GetHeadBranchLink(ctx)
+			}
+		case !git_model.IsErrBranchNotExist(err):
+			log.Error("GetBranch: %v", err)
+		}
+	}
+	ctx.Data["HeadBranchLink"] = headBranchLink
 	ctx.Data["BaseBranchLink"] = pull.GetBaseBranchLink(ctx)
 }
 
diff --git a/templates/repo/issue/view_title.tmpl b/templates/repo/issue/view_title.tmpl
index 1243681f3a2..7fa77b3f1cf 100644
--- a/templates/repo/issue/view_title.tmpl
+++ b/templates/repo/issue/view_title.tmpl
@@ -50,9 +50,14 @@
 			{{if .Issue.IsPull}}
 				{{$headHref := .HeadTarget}}
 				{{if .HeadBranchLink}}
-					{{$headHref = HTMLFormat `<a href="%s">%s</a>` .HeadBranchLink $headHref}}
+					{{$headHref = HTMLFormat `<a href="%s">%s</a> <button class="btn interact-fg" data-tooltip-content="%s" data-clipboard-text="%s">%s</button>` .HeadBranchLink $headHref (ctx.Locale.Tr "copy_branch") .HeadTarget (svg "octicon-copy" 14)}}
+				{{else}}
+					{{if .Issue.PullRequest.IsAgitFlow}}
+						{{$headHref = HTMLFormat `%s <a href="%s" target="_blank"><span class="ui label basic tiny" data-tooltip-content="%s">AGit</span></a>` $headHref "https://docs.gitea.com/usage/agit" (ctx.Locale.Tr "repo.pull.agit_documentation")}}
+					{{else}}
+						{{$headHref = HTMLFormat `<span data-tooltip-content="%s">%s</span>` (ctx.Locale.Tr "form.target_branch_not_exist") $headHref}}
+					{{end}}
 				{{end}}
-				{{$headHref = HTMLFormat `%s <button class="btn interact-fg" data-tooltip-content="%s" data-clipboard-text="%s">%s</button>` $headHref (ctx.Locale.Tr "copy_branch") .HeadTarget (svg "octicon-copy" 14)}}
 				{{$baseHref := .BaseTarget}}
 				{{if .BaseBranchLink}}
 					{{$baseHref = HTMLFormat `<a href="%s">%s</a>` .BaseBranchLink $baseHref}}