filter-repo: --sensitive-data-removal requires git >= 2.36.0

Also, although people using other features can get away with older git
versions, we may as well advertise 2.36 as the minimum version; it's
nearly three years old.

Signed-off-by: Elijah Newren <newren@gmail.com>

Author: newren

README.md

@@ -38,8 +38,7 @@ history rewriting tools](contrib/filter-repo-demos).
 
 filter-repo requires:
 
-  * git >= 2.22.0 at a minimum; [some features](#upstream-improvements)
-    require git >= 2.24.0 or later
+  * git >= 2.36.0
   * python3 >= 3.6
 
 # How do I install it?

git-filter-repo

@@ -2307,6 +2307,12 @@ EXAMPLES
       if b'--combined-all-paths' not in output:
         # We need a version of git-diff-tree with --combined-all-paths
         raise SystemExit(_("Error: need git >= 2.22.0"))
+    if args.sensitive_data_removal:
+      p = subproc.Popen('git cat-file -h'.split(),
+                        stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
+      output = p.stdout.read()
+      if b"--batch-command" not in output: # pragma: no cover
+        raise SystemExit(_("Error: need git >= 2.36.0"))
     # End of sanity checks on git version
     if args.max_blob_size:
       suffix = args.max_blob_size[-1]