Use UUIDs instead of commit hashes for new branch names (git ambigous)

lib/tfw/components/snapshot_provider.py

@@ -6,6 +6,7 @@ from subprocess import run
 from getpass import getuser
 from os.path import isdir
 from datetime import datetime
+from uuid import uuid4
 
 
 class SnapshotProvider:
@@ -73,18 +74,12 @@ class SnapshotProvider:
         ))
 
     def _checkout_new_branch_from_head(self):
-        head_hash = self._get_head_hash()
+        branch_name = uuid4()
         self._run((
             'git', 'branch',
-            head_hash
-        ))
-        self._checkout(head_hash)
-
-    def _get_head_hash(self):
-        return self._get_stdout((
-            'git', 'rev-parse',
-            'HEAD'
+            branch_name
         ))
+        self._checkout(branch_name)
 
     def restore_snapshot(self, date):
         commit = self._get_commit_from_timestamp(date)