diff --git a/advanced-github-plugin-installer.php b/advanced-github-plugin-installer.php
index 13e42c8..14612a5 100644
--- a/advanced-github-plugin-installer.php
+++ b/advanced-github-plugin-installer.php
@@ -342,7 +342,7 @@ function install_update_github_plugin($repo_url, $access_token, $selected_versio
 
         // Validate version before checkout
         if (!empty($selected_version)) {
-            $update_command = "cd " . escapeshellarg($plugin_dir) . " && git fetch --all && git checkout " . escapeshellarg($selected_version) . " 2>&1";
+            $update_command = "cd " . escapeshellarg($plugin_dir) . " && git fetch --all && git reset --hard && git clean -fd && git checkout " . escapeshellarg($selected_version) . " 2>&1";
             exec($update_command, $output, $return_var);
 
             if ($return_var !== 0) {
@@ -354,8 +354,8 @@ function install_update_github_plugin($repo_url, $access_token, $selected_versio
                 wp_die('Failed to update the plugin. Error: ' . implode("\n", $output));
             }
         } else {
-            // If no version specified, just fetch and pull the default branch
-            $update_command = "cd " . escapeshellarg($plugin_dir) . " && git fetch --all && git pull 2>&1";
+            // If no version specified, just fetch and reset to remote branch (overwrites local changes)
+            $update_command = "cd " . escapeshellarg($plugin_dir) . " && git fetch origin && git reset --hard @{u} && git clean -fd 2>&1";
             exec($update_command, $output, $return_var);
 
             if ($return_var !== 0) {
@@ -633,7 +633,7 @@ function sync_github_project() {
 
         // Update existing plugin - validate version before checkout
         if (!empty($version)) {
-            $update_command = "cd " . escapeshellarg($plugin_dir) . " && git fetch --all && git checkout " . escapeshellarg($version) . " 2>&1";
+            $update_command = "cd " . escapeshellarg($plugin_dir) . " && git fetch --all && git reset --hard && git clean -fd && git checkout " . escapeshellarg($version) . " 2>&1";
             exec($update_command, $output, $return_var);
 
             if ($return_var !== 0) {
@@ -645,8 +645,8 @@ function sync_github_project() {
                 wp_send_json_error('Synchronisierung fehlgeschlagen: ' . implode("\n", $output));
             }
         } else {
-            // If no version specified, just fetch and pull the default branch
-            $update_command = "cd " . escapeshellarg($plugin_dir) . " && git fetch --all && git pull 2>&1";
+            // If no version specified, just fetch and reset to remote branch (overwrites local changes)
+            $update_command = "cd " . escapeshellarg($plugin_dir) . " && git fetch origin && git reset --hard @{u} && git clean -fd 2>&1";
             exec($update_command, $output, $return_var);
 
             if ($return_var !== 0) {