diff --git a/switch_all_submodules_to_head_and_clean b/switch_all_submodules_to_head_and_clean
index 2c136fd..661ff8d 100755
--- a/switch_all_submodules_to_head_and_clean
+++ b/switch_all_submodules_to_head_and_clean
@@ -33,7 +33,7 @@ if [[ -z "$remote" ]]; then
 fi
 
 # get git user
-echobd "Preparing $(git rev-parse --show-toplevel | xargs -r basename) $branch branch for development use"
+echobd "Preparing $(git rev-parse --show-toplevel | xargs -r basename) on $branch branch for development use"
 if [[ $1 == "" ]]; then
 	gituser=`git config --local remote.$remote.url | sed -n "s|\(https\?://\)\?\([^@]*\)@.*|\2|p" | grep -v "\(anonymous\|system\)"`
 else
@@ -48,6 +48,10 @@ if [[ $gituser == "" ]]; then
 	gituser="anonymous"
 fi
 
+if [[ -n "$(git config --get user.signingkey)" ]]; then
+	GIT_SIGN="-S"
+fi
+
 # check git abilities
 if [[ -n "`git status --help 2>/dev/null|grep -- '--ignore-submodules'`" ]]; then
   GIT_IGNORE_SUBMODULES="--ignore-submodules"
@@ -76,9 +80,13 @@ updateModule() {
     fi
     git remote |
     while read REMOTE; do
-      REPO_SERVER=$(git config remote."$REMOTE".url |
+      REPO_URL=$(git config remote."$REMOTE".url)
+      REPO_SERVER=$(echo "$REPO_URL" |
                     sed -n "s|^http[^/]*/*\([^@]*@\)\?\([^/]*\)/.*|\2|p")
-      if [ -x /usr/bin/fping ] && [ -n "$REPO_SERVER" ]; then
+      if [ -x /usr/bin/curl ] && [ "${REPO_URL}" != "${REPO_URL#http}" ]; then
+        curl --silent --connect-timeout 10 --max-time 15 --location --netrc \
+             $REPO_URL/info/refs?service=git-upload-pack >/dev/null || continue
+      elif [ -x /usr/bin/fping ] && [ -n "$REPO_SERVER" ]; then
         fping -q -r1 "$REPO_SERVER" || continue
       fi
       echo Fetching $REMOTE
@@ -88,7 +96,7 @@ updateModule() {
     git checkout $branch
     remote=`git config branch."$branch".remote`
     [[ -n "$remote" ]] || return
-    git rebase $remote/$branch $branch
+    git rebase $GIT_SIGN $remote/$branch $branch
     if [[ ! -z "`git status --porcelain $GIT_IGNORE_SUBMODULES`" ]]; then
         git reset --hard HEAD
         git clean -dxff
@@ -135,8 +143,9 @@ updateModule() {
                     cd $REPO_LOCALTREE &&
                     git fetch &&
                     git worktree prune &&
-                    git worktree add $PARENTDIR/$MODULE$submodule $branch &&
+                    git worktree add $PARENTDIR/$MODULE$submodule origin/$branch &&
                     cd $PARENTDIR/$MODULE$submodule &&
+                    git checkout $branch &&
                     git branch --set-upstream-to=origin/$branch
                   ) || continue
                 fi