diff --git a/bin/git-synk b/bin/git-synk
index 59d33f60..afadb808 100755
--- a/bin/git-synk
+++ b/bin/git-synk
@@ -4,13 +4,12 @@
 # Synchronise a local git repository with remote
 #
 
+import argparse
 import datetime
 import os
 import re
 from subprocess import call, getoutput, STDOUT
 
-fetch_window = 600
-
 
 def is_git_repo(path):
     return os.path.isdir(path) and (
@@ -44,7 +43,7 @@ def printf(message):
     print(message, end="")
 
 
-def synk(path):
+def synk(path, fetch_window: int):
     if not is_git_repo(path):
         raise Exception(
             f"Directory {path} is not a git repository and can not be synked"
@@ -116,18 +115,24 @@ def synk(path):
 
 
 def run():
+    parser = argparse.ArgumentParser(description="Git synk")
+    parser.add_argument("--window", "-w", help="fetch window in seconds", default=600)
+    args = parser.parse_args()
+
+    fetch_window = int(args.window)
+
     cwd = os.getcwd()
     match = re.search("projects/things", cwd)
     if not match:
         raise Exception("Can only sync in project/things directory")
 
     if is_git_repo(cwd):
-        synk(cwd)
+        synk(cwd, fetch_window=fetch_window)
     else:
         for child in os.listdir(cwd):
             directory = os.path.join(cwd, child)
             if is_git_repo(directory):
-                synk(directory)
+                synk(directory, fetch_window=fetch_window)
 
 
 run()
diff --git a/bin/things-sync b/bin/things-sync
index 02ab81a5..17025614 100755
--- a/bin/things-sync
+++ b/bin/things-sync
@@ -8,11 +8,23 @@ is-connected || (echo "Not connected, no sync" ; exit 1)
 
 FETCH_WINDOW=600
 EXTRA_ARGS=""
-while getopts "cw:" o; do case "$o" in
-  c) EXTRA_ARGS="-c" ;;
+while getopts "chw:" o; do case "$o" in
+  h) HELP=y ;;
   w) FETCH_WINDOW=$OPTARG ;;
 esac done
 
+help() {
+  cat << EOF
+  -h      this help
+  -w 600  set fetch window in seconds
+EOF
+}
+
+if [ "$HELP" == "y" ] ; then
+  help
+  exit 1
+fi
+
 cd $THINGS_DIR
 git synk -w $FETCH_WINDOW $EXTRA_ARGS