Reflect changes in the original repository in the mirror repository.

update_mirror_repository.sh

# I refer to "git --How do I update my bare repo? --Stack Overflow https://stackoverflow.com/questions/3382679/how-do-i-update-my-bare-repo"

# Create mirror repository
git clone --bare https://github.com/Keiku/test1.git
cd test1.git
git push --mirror https://github.com/Keiku/test2.git

# Promote development with mirror repository
cd ../
git clone https://github.com/Keiku/test2.git
cd test2
git checkout -b develop
touch test2-1.txt
git add test2-1.txt
git commit -m 'add test2-1.txt'
git push origin develop
git checkout main

# Update original repository
cd ../
git clone https://github.com/Keiku/test1.git
cd test1
touch test1-1.txt
git add test1-1.txt
git commit -m 'add test1-1.txt'
git push origin main

# 1st time: Reflect changes in the original repository in the mirror repository
cd ../test2
git remote add remote_site https://github.com/Keiku/test1.git
git fetch -u remote_site '+refs/heads/*:refs/heads/*'
git fetch -u remote_site '+refs/tags/*:refs/tags/*'
git push --mirror
git reset --hard origin/main

# Update original repository
cd ../test1
touch test1-2.txt
git add test1-2.txt
git commit -m 'add test1-2.txt'
git push origin main

# 2nd time: Reflect changes in the original repository in the mirror repository
cd ../test2
git fetch -u remote_site '+refs/heads/*:refs/heads/*'
git fetch -u remote_site '+refs/tags/*:refs/tags/*'
git push --mirror
git reset --hard origin/main

# Reflect changes in main in develop
git checkout develop
git merge origin main