diff --git a/git_update.sh b/git_update.sh
index b55e086..0a44d0a 100755
--- a/git_update.sh
+++ b/git_update.sh
@@ -16,8 +16,8 @@ declare -A varia
 summary="$0 [options] <repo>"
 
 usage[r]="Reference of wanted commit"
-varia[r]=reference
-reference=main
+varia[r]=ref
+ref=main
 
 usage[d]="Destination of clone"
 varia[d]=dst
@@ -75,19 +75,16 @@ if [ -d .git ] ; then
     if [ -n "$tag" ] ; then
         tagref="tags/$tag"
     fi
-
-	run git fetch origin "$branch" --tags
-	run git checkout --force $tagref -B "$branch" #merge in ref
-    #run git reset --hard # TODO we can keep some files?
+	run git submodule update --init --recursive --force --depth=1 --remote 
+	run git fetch --tags --depth=1 --prune --prune-tags origin $ref
+	run git reset --hard FETCH_HEAD 
+	git reflog expire --expire=now --all 
+	git gc --aggressive --prune=now
 	# Preserve existing files in some cases
-	if ! "$nonempty_target" ; then
+	if ! "$nonempty_target" ; then #so we keep uncommitted files when not in -N
 		git clean -qffdx
 	fi
-	run git module update --init --recursive --force --recommend-shallow
-	run git submodule foreach git fetch
-	run git submodule foreach git checkout --force HEAD
-	run git submodule foreach git reset --hard
-	run git submodule foreach git clean -fdx
+
 else
 	clone_dst='.'
 
@@ -95,8 +92,7 @@ else
 	if "$nonempty_target" ; then
 		clone_dst="$(mktemp -d)"
 	fi
-
-    run git clone -b "$branch" --single-branch --recurse-submodules --shallow-submodules --depth 1 --config core.sshCommand="$ssh_opt" "$repo" "$clone_dst"
+    run git clone -b "$ref" --recurse-submodules --shallow-submodules --depth 1 --config core.sshCommand="$ssh_opt" "$repo" "$clone_dst"
 
 	# To override an existing dir, we then move everything to that dir
 	if "$nonempty_target" ; then
diff --git a/test_git_update.sh b/test_git_update.sh
index 62941c6..90d4d09 100755
--- a/test_git_update.sh
+++ b/test_git_update.sh
@@ -34,7 +34,7 @@ DESCRIPTION
     TEST0: git cloned in an empty directory
     TEST1: git cloned in an empty directory with tag
     TEST2: git cloned in an empty directory with branch
-
+    TEST3: git cloned in an existing directory
 "
 }
 
@@ -117,9 +117,9 @@ test0 (){
     history_check $REPO_NAME
     case0=$(($history_result+$cloning_result))
     if [ "$case0" = "0" ]; then
-        echo "case 0, in a empty directory without history: OK"
+        echo "case 0, in a empty directory: OK"
     else
-        echo "case 0, in a empty directory without history: FAIL"
+        echo "case 0, in a empty directory: FAIL"
     fi
 }
 
@@ -138,9 +138,9 @@ test1(){
 
     case1=$(($cloning_result+$history_result+$tag_result))
     if [ $case1 = 0 ]; then
-        echo "case 1, in a empty directory without history, with tag: OK"
+        echo "case 1, in a empty directory, with tag: OK"
     else
-        echo "case 1, in a empty directory without history, with tag: FAIL"
+        echo "case 1, in a empty directory, with tag: FAIL"
     fi
 }
 
@@ -159,9 +159,9 @@ test2(){
 
     case2=$(($cloning_result+$history_result+$branch_result))
     if [ $case2 = 0 ]; then
-        echo "case 2, in a empty directory without history, with branch: OK"
+        echo "case 2, in a empty directory, with branch: OK"
     else
-        echo "case 2, in a empty directory without history, with branch: FAIL"
+        echo "case 2, in a empty directory, with branch: FAIL"
     fi
 }
 
@@ -202,13 +202,23 @@ test3(){
     cd ..
     case3=$(($cloning_result+$history_result+$existing_result))
     if [ $case3 = 0 ]; then
-        echo "case 3, in a non-empty directory without history: OK"
+        echo "case 3, in a non-empty directory  : OK"
     else
-        echo "case 3, in a non-empty directory without history: FAIL"
+        echo "case 3, in a non-empty directory  : FAIL"
     fi
 
 }
 
+TEST4(){
+#CASE 4: git updated ff
+    section TEST4
+    
+}
+
+
+
+
+
 
 while getopts ":hn:a" option; do
    case $option in
diff --git a/texte_explicatif.txt b/texte_explicatif.txt
index 751de51..afb8b3b 100644
--- a/texte_explicatif.txt
+++ b/texte_explicatif.txt
@@ -23,7 +23,7 @@ Comment minimiser la consommation en ressources mémoire et flux de données d'u
 # Résultats finaux
 La combinaison finale retenue est :
 ## Pour cloner : 
-git clone --depth=1  --recurse-submodules --remote-submodules --shallow-submodules 
+git clone --depth=1 --recurse-submodules --remote-submodules
 
     depth=1 permet d'uniquement cloner le dernier commit et les objets nécessaires. Par défaut, elle est single-branch.
     recurse-submodules s'assure que le contenu des submodules est cloné
@@ -33,7 +33,7 @@ git clone --depth=1  --recurse-submodules --remote-submodules --shallow-submodul
 
 ## Pour mettre à jour : 
 git submodule update --init --recursive --force --depth=1 --remote 
-git fetch --progress --tags --depth=1 --prune --prune-tags origin
+git fetch --tags --depth=1 --prune --prune-tags origin
 git reset --hard origin/main 
 git reflog expire --expire=now --all 
 git gc --aggressive --prune=now