Merge branch 'jh/maint-submodule-status-in-void'

diff --git a/git-submodule.sh b/git-submodule.sh
index 664f21721cb876eed7da167744066d834521c825..5869c00f2d5db4d8316002267a8605096357d5ed 100755 (executable)
--- a/git-submodule.sh
+++ b/git-submodule.sh
@@ -553,12 +553,15 @@ cmd_summary() {
 
        test $summary_limit = 0 && return
 
-       if rev=$(git rev-parse -q --verify "$1^0")
+       if rev=$(git rev-parse -q --verify --default HEAD ${1+"$1"})
        then
                head=$rev
                shift
+       elif test -z "$1" -o "$1" = "HEAD"
+       then
+               return
        else
-               head=HEAD
+               head="HEAD"
        fi
 
        if [ -n "$files" ]