Example pre-commit hook to prevent submitting large files:
{{{
#!/bin/bash

maxsize=10 # maximum file size in Mb

changedFiles=$(git diff --cached --name-only)

err=0
for changedFile in $changedFiles
do
  lfs=`git check-attr filter $changedFile | grep ': filter: lfs' | wc -l` # check if lfs-controlled
  filesize=`du -b --apparent-size $changedFile | cut -f 1` # check file size

  if [ "$filesize" -gt "$maxsize" ] && [ "$lfs" -eq "0" ]
  then 
    if [ "$err" -eq "0" ]
    then 
      echo "The following files to commit are larger than $maxsize Mb and should use LFS" 
    fi
    echo " - $changedFile $filesize"
    err=1
  fi
done

exit $err
}}}