diff --git a/bin/dune b/bin/dune
index cc61281..a815cf0 100644
--- a/bin/dune
+++ b/bin/dune
@@ -14,6 +14,7 @@
   fmt.tty
   logs.fmt
   git-unix
+  bos
   yocaml
   yocaml_git
   yocaml_syndication
diff --git a/bin/push.ml b/bin/push.ml
index ed381bb..b65e992 100644
--- a/bin/push.ml
+++ b/bin/push.ml
@@ -15,12 +15,34 @@ let reporter ppf =
   in
   { Logs.report }
 
+let run_git_rev_parse () =
+  let open Bos in
+  let value = OS.Cmd.run_out
+      Cmd.(v "git" % "describe" % "--always" % "--dirty"
+           % "--exclude=*" % "--abbrev=0")
+  in
+  match OS.Cmd.out_string value with
+  | Ok (value, (_, `Exited 0)) -> Some value
+  | Ok (value, (run_info, _)) ->
+    Logs.warn (fun m -> m "Failed to get commit id: %a: %s"
+                  Cmd.pp (OS.Cmd.run_info_cmd run_info)
+                  value);
+    None
+  | Error `Msg e ->
+    Logs.warn (fun m -> m "Failed to get commit id: %s" e);
+    None
+
+let message () =
+  match run_git_rev_parse () with
+  | Some hash -> Fmt.str "Pushed by YOCaml 2 from %s" hash
+  | None -> Fmt.str "Pushed by YOCaml 2"
+
 let () = Fmt_tty.setup_std_outputs ~style_renderer:`Ansi_tty ~utf_8:true ()
 let () = Logs.set_reporter (reporter Fmt.stdout)
 (* let () = Logs.set_level ~all:true (Some Logs.Debug) *)
 let author = ref "The Robur Team"
 let email = ref "team@robur.coop"
-let message = ref "Pushed by YOCaml 2"
+let message = ref (message ())
 let remote = ref "git@git.robur.coop:robur/blog.robur.coop.git#gh-pages"
 let host = ref "https://blog.robur.coop"
 
diff --git a/blogger.opam b/blogger.opam
index a5bfb6b..aaf5726 100644
--- a/blogger.opam
+++ b/blogger.opam
@@ -24,6 +24,7 @@ depends: [
   "logs" {>= "0.7.0" }
   "cmdliner" { >= "1.0.0"}
   "http-lwt-client"
+  "bos"
   "yocaml" {>= "2.0.1"}
   "yocaml_unix"
   "yocaml_yaml"