Mirror a git repository into another in Linux

gitmirror.sh

#!/usr/bin/env bash
# Mirror a git repository into another
# script by github.com/hhromic

# origin git repository
declare -r ORIGIN="<<your origin git repository here>>"

# destination git repository (mirror)
declare -r MIRROR="<<your destination (mirror) git repository here>>"

# terminal color settings
declare -r YLW=$(tput setaf 3 2>/dev/null)
declare -r MGN=$(tput setaf 5 2>/dev/null)
declare -r CYN=$(tput setaf 6 2>/dev/null)
declare -r RST=$(tput sgr0 2>/dev/null)

# make a temporary directory for mirroring
echo "${YLW}Creating temporary working directory ...${RST}"
TMPDIR=$(mktemp -d) || exit

# clone origin, add mirror as remote and synchronise in mirror
echo "${YLW}Mirroring '${MGN}${ORIGIN}${YLW}' into '${CYN}${MIRROR}${YLW}' ...${RST}"
git clone --mirror "$ORIGIN" "$TMPDIR" || exit
git --git-dir "$TMPDIR" remote add --mirror=push mirror "$MIRROR" || exit
git --git-dir "$TMPDIR" fetch --prune origin || exit
git --git-dir "$TMPDIR" push --mirror mirror || exit

# clean temporary directory
echo "${YLW}Cleaning temporary directory ...${RST}"
rm -rf "$TMPDIR" || exit