diff --git a/bdt.sh b/bdt.sh
index a187043..380ba96 100755
--- a/bdt.sh
+++ b/bdt.sh
@@ -2232,9 +2232,29 @@ cmd_self_update() {
         (
             cd "$cli_dir" || exit 1
             local remote="origin"
-            git fetch "$remote" "$branch" 2>/dev/null || true
-            git pull --ff-only "$remote" "$branch" 2>/dev/null || git pull --ff-only "$remote" main
-        ) || { err "git pull falló en ${cli_dir}"; return 1; }
+            git fetch "$remote" "$branch" || git fetch "$remote"
+
+            # Repo sembrado con git init local (master sin commits) → alinear con origin/main
+            local cur_branch
+            cur_branch="$(git branch --show-current 2>/dev/null || echo "")"
+            if [[ -z "$cur_branch" || "$cur_branch" == "master" ]] \
+                && git show-ref --verify --quiet "refs/remotes/${remote}/${branch}"; then
+                git checkout -B "$branch" "${remote}/${branch}"
+            fi
+
+            git branch --set-upstream-to="${remote}/${branch}" "$branch" 2>/dev/null \
+                || git branch --set-upstream-to="${remote}/${branch}" main 2>/dev/null \
+                || true
+
+            git pull --ff-only "$remote" "$branch"
+        ) || {
+            err "git pull falló en ${cli_dir}"
+            echo -e "  ${GRAY}Probá manualmente:${NC}"
+            echo -e "  ${GRAY}  cd ${cli_dir} && git fetch origin && git checkout -B main origin/main${NC}"
+            echo -e "  ${GRAY}  git branch --set-upstream-to=origin/main main && git pull${NC}"
+            echo -e "  ${GRAY}Si pide usuario/clave: bdt git-auth <usuario-gitlab>${NC}"
+            return 1
+        }
         ok "Repo actualizado"
     fi