git-debrebase: new-upstream-v0: fixes

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>

diff --git a/git-debrebase b/git-debrebase
index b9cef978d1f0fed5970f2da7231e1e6162d8aa84..f254ddc9ae91ad77cb71158f80522c7c2617b064 100755 (executable)
--- a/git-debrebase
+++ b/git-debrebase
@@ -848,7 +848,7 @@ sub cmd_new_upstream_v0 () {
        print STDERR "preflight check failed: $msg\n";
     };
 
-    $piece->('', Old => $old_upstream);
+    $piece->('', Old => $old_upstream->{CommitId});
 
     if ($old_upstream->{Msg} =~ m{^\[git-debrebase }m) {
        if ($old_upstream->{Msg} =~