Hooks: Simplify deny_binary commit iteration logic

hooks/deny_binary

@@ -52,8 +52,7 @@ while read oldrev newrev refname; do
   fi
 
   # Loop over each commit.
-  for commit in $(git rev-list --objects ${rev_range} |
-    git cat-file --batch-check='%(objectname) %(objecttype) %(objectsize) %(rest)' | grep commit | awk '{print $1}'); do
+  for commit in $(git rev-list --objects ${rev_range} --filter=object:type=commit); do
 
     # Get list of potentially binary files in this commit
     mapfile -t binary_files < <(