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-rwxr-xr-xgit-submodule.sh3
1 files changed, 2 insertions, 1 deletions
diff --git a/git-submodule.sh b/git-submodule.sh
index 383dc4511..9aa57dd6f 100755
--- a/git-submodule.sh
+++ b/git-submodule.sh
@@ -559,7 +559,8 @@ cmd_summary() {
test $# = 0 || shift
elif test -z "$1" -o "$1" = "HEAD"
then
- return
+ # before the first commit: compare with an empty tree
+ head=$(git hash-object -w -t tree --stdin </dev/null)
else
head="HEAD"
fi