From b721eec54ba6499014541f4796b7cde282596b08 Mon Sep 17 00:00:00 2001
From: Daniel Bauten <10648448+DanielBauten@users.noreply.github.com>
Date: Thu, 27 Aug 2020 11:37:18 +0200
Subject: [PATCH 1/2] create subrepo branch at pulled commit, if there are no
 relevant local commits

---
 lib/git-subrepo | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/lib/git-subrepo b/lib/git-subrepo
index 38655703..c1705d8b 100755
--- a/lib/git-subrepo
+++ b/lib/git-subrepo
@@ -785,7 +785,12 @@ subrepo:branch() {
       fi
     done
 
-    o "Create branch '$branch' for this new commit set $prev_commit."
+    if [[ -z "$prev_commit" ]]; then # i.e. there are no new reachable commits
+      o "Create branch '$branch' for subrepo commit $subrepo_commit."
+      prev_commit="$subrepo_commit"
+    else
+      o "Create branch '$branch' for this new commit set $prev_commit."
+    fi
     RUN git branch "$branch" "$prev_commit"
   else
     o "No parent setting, use the subdir content."

From 8fb6be3fb1500ab845081fc26ecdb950e9c0438c Mon Sep 17 00:00:00 2001
From: Daniel Bauten <10648448+DanielBauten@users.noreply.github.com>
Date: Thu, 27 Aug 2020 13:27:23 +0200
Subject: [PATCH 2/2] avoid unnecessary long filter range, if there aren't any
 relevant new commits

---
 lib/git-subrepo | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/git-subrepo b/lib/git-subrepo
index c1705d8b..b1e61544 100755
--- a/lib/git-subrepo
+++ b/lib/git-subrepo
@@ -788,6 +788,7 @@ subrepo:branch() {
     if [[ -z "$prev_commit" ]]; then # i.e. there are no new reachable commits
       o "Create branch '$branch' for subrepo commit $subrepo_commit."
       prev_commit="$subrepo_commit"
+      first_gitrepo_commit="$subrepo_commit" # force neutralization of $filter to avoid unnecessary large range (see below)
     else
       o "Create branch '$branch' for this new commit set $prev_commit."
     fi