source /usr/local/Cellar/git/2.29.1/etc/bash_completion.d/git-completion.bash
https://docs.brew.sh/Shell-Completion
if type brew &>/dev/null; then
HOMEBREW_PREFIX="$(brew --prefix)"
if [[ -r "${HOMEBREW_PREFIX}/etc/profile.d/bash_completion.sh" ]]; then
source "${HOMEBREW_PREFIX}/etc/profile.d/bash_completion.sh"
else
for COMPLETION in "${HOMEBREW_PREFIX}/etc/bash_completion.d/"*; do
[[ -r "$COMPLETION" ]] && source "$COMPLETION"
done
fi
fi