diff --git a/server/config/raw/global_cfg.go b/server/config/raw/global_cfg.go
index c13ac318c..90a9476b0 100644
--- a/server/config/raw/global_cfg.go
+++ b/server/config/raw/global_cfg.go
@@ -30,16 +30,14 @@ type GlobalCfg struct {
 }
 
 type AdhocMode struct {
-	Repo     string `yaml:"repo" json:"repo"`
-	Root     string `yaml:"root" json:"root"`
-	Revision string `yaml:"revision" json:"revision"`
+	Repo  string `yaml:"repo" json:"repo"`
+	PRNum int    `yaml:"pr_num" json:"pr_num"`
 }
 
 func (t AdhocMode) ToValid() valid.AdhocMode {
 	return valid.AdhocMode{
-		Repo:     t.Repo,
-		Root:     t.Root,
-		Revision: t.Revision,
+		Repo:  t.Repo,
+		PRNum: t.PRNum,
 	}
 }
 
diff --git a/server/config/valid/global_cfg.go b/server/config/valid/global_cfg.go
index 14683da8d..92aab936a 100644
--- a/server/config/valid/global_cfg.go
+++ b/server/config/valid/global_cfg.go
@@ -68,9 +68,8 @@ type GlobalCfg struct {
 }
 
 type AdhocMode struct {
-	Repo     string
-	Root     string
-	Revision string
+	Repo  string
+	PRNum int
 }
 
 type GithubTeam struct {