Amend the last commit overriding the committer and author info

git-recommit.sh

#!/bin/sh
# Amend the last commit overriding the committer and author info.
#
# The committer info is forced to be the same as the author's.
#
# Options:
#   $1  Overrides date
#   $2  Overrides name
#   $3  Overrides email
#
# You can pass an empty argument to skip it and change the next one.

D=${1:-$(git log --format='%ad' -1)}
N=${2:-$(git log --format='%an' -1)}
E=${3:-$(git log --format='%ae' -1)}

GIT_COMMITTER_DATE=$D \
GIT_COMMITTER_NAME=$N \
GIT_COMMITTER_EMAIL=$E \
git commit --amend --date="$D" --author="$N <$E>"