diff --git a/api/tangled/gitrefUpdate.go b/api/tangled/gitrefUpdate.go
new file mode 100644
index 0000000..9c7d30d
--- /dev/null
+++ b/api/tangled/gitrefUpdate.go
@@ -0,0 +1,33 @@
+// Code generated by cmd/lexgen (see Makefile's lexgen); DO NOT EDIT.
+
+package tangled
+
+// schema: sh.tangled.git.refUpdate
+
+//import (
+//	"github.com/bluesky-social/indigo/lex/util"
+//)
+
+const (
+	GitRefUpdateNSID = "sh.tangled.git.refUpdate"
+)
+
+//func init() {
+//	util.RegisterType("sh.tangled.git.refUpdate", &GitRefUpdate{})
+//} //
+// RECORDTYPE: GitRefUpdate
+type GitRefUpdate struct {
+	LexiconTypeID string `json:"$type,const=sh.tangled.git.refUpdate" cborgen:"$type,const=sh.tangled.git.refUpdate"`
+	// committerDid: did of the user that pushed this ref
+	CommitterDid string `json:"committerDid" cborgen:"committerDid"`
+	// newSha: new SHA of this ref
+	NewSha string `json:"newSha" cborgen:"newSha"`
+	// oldSha: old SHA of this ref
+	OldSha string `json:"oldSha" cborgen:"oldSha"`
+	// ref: Ref being updated
+	Ref string `json:"ref" cborgen:"ref"`
+	// repoDid: did of the owner of the repo
+	RepoDid string `json:"repoDid" cborgen:"repoDid"`
+	// repoName: name of the repo
+	RepoName string `json:"repoName" cborgen:"repoName"`
+}
diff --git a/cmd/gen.go b/cmd/gen.go
index c7df284..ea8a337 100644
--- a/cmd/gen.go
+++ b/cmd/gen.go
@@ -15,6 +15,7 @@ func main() {
 		"api/tangled/cbor_gen.go",
 		"tangled",
 		tangled.FeedStar{},
+		tangled.GitRefUpdate{},
 		tangled.GraphFollow{},
 		tangled.KnotMember{},
 		tangled.PublicKey{},
diff --git a/lexicons/git/refUpdate.json b/lexicons/git/refUpdate.json
new file mode 100644
index 0000000..c4fe0c3
--- /dev/null
+++ b/lexicons/git/refUpdate.json
@@ -0,0 +1,56 @@
+{
+  "lexicon": 1,
+  "id": "sh.tangled.git.refUpdate",
+  "defs": {
+    "main": {
+      "type": "record",
+      "description": "An update to a git repository, emitted by knots.",
+      "key": "tid",
+      "record": {
+        "type": "object",
+        "required": [
+          "ref",
+          "committerDid",
+          "repoDid",
+          "repoName",
+          "oldSha",
+          "newSha"
+        ],
+        "properties": {
+          "ref": {
+            "type": "string",
+            "description": "Ref being updated",
+            "maxGraphemes": 256,
+            "maxLength": 2560
+          },
+          "committerDid": {
+            "type": "string",
+            "description": "did of the user that pushed this ref",
+            "format": "did"
+          },
+          "repoDid": {
+            "type": "string",
+            "description": "did of the owner of the repo",
+            "format": "did"
+          },
+          "repoName": {
+            "type": "string",
+            "description": "name of the repo"
+          },
+          "oldSha": {
+            "type": "string",
+            "description": "old SHA of this ref",
+            "minLength": 40,
+            "maxLength": 40
+          },
+          "newSha": {
+            "type": "string",
+            "description": "new SHA of this ref",
+            "minLength": 40,
+            "maxLength": 40
+          }
+        }
+      }
+    }
+  }
+}