Rewrite user commit info

gistfile1.txt

git filter-branch --commit-filter '
    
an="$GIT_AUTHOR_NAME"                                
am="$GIT_AUTHOR_EMAIL"   
cn="$GIT_COMMITTER_NAME"             
cm="$GIT_COMMITTER_EMAIL"                                                
    
if [ "$GIT_COMMITTER_EMAIL" = "vagrant@wheezy64-puppet3.vagrantup.com" ]                           
then                                                                       
    cn="Luis Santos"
    cm="luis.santos@telecom.pt"
fi
if [ "$GIT_AUTHOR_EMAIL" = "Vagrant User" ]
then
    an="Luis Santos"
    am="luis.santos@telecom.pt"
fi

export GIT_AUTHOR_NAME="$an"
export GIT_AUTHOR_EMAIL="$am"
export GIT_COMMITTER_NAME="$cn"
export GIT_COMMITTER_EMAIL="$cm"
'