Reset all the information about author & committer in your repo git log.

reset.sh

git filter-branch --env-filter '

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

if [ "$GIT_COMMITTER_EMAIL" = "XXX@XX.com" ]
then
    cn="XXX"
    cm="XXX@XX.com"
fi
if [ "$GIT_AUTHOR_EMAIL" = "XXX@XX.com" ]
then
    an="XXX"
    am="XXX@XX.com"
fi

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