stash: learn to parse -m/--message like commit does

diff --git a/t/t3200-branch.sh b/t/t3200-branch.sh
index 9d707d2a40a457abcd85fb93d9f8195946d09d01..5fc2fb425b007c3fec736df5cf13782b8e881f58 100755 (executable)
--- a/t/t3200-branch.sh
+++ b/t/t3200-branch.sh
@@ -162,6 +162,19 @@ test_expect_success 'git branch -M baz bam should add entries to .git/logs/HEAD'
        grep "^0\{40\}.*$msg$" .git/logs/HEAD
 '
 
+test_expect_success 'git branch -M should leave orphaned HEAD alone' '
+       git init orphan &&
+       (
+               cd orphan &&
+               test_commit initial &&
+               git checkout --orphan lonely &&
+               grep lonely .git/HEAD &&
+               test_path_is_missing .git/refs/head/lonely &&
+               git branch -M master mistress &&
+               grep lonely .git/HEAD
+       )
+'
+
 test_expect_success 'resulting reflog can be shown by log -g' '
        oid=$(git rev-parse HEAD) &&
        cat >expect <<-EOF &&