A: https://github.com/tianheg/a.git
B: https://github.com/tianheg/b.git
Want merge B into A. Keep A and B’s commits.
git clone https://github.com/tianheg/a.git
git clone https://github.com/tianheg/b.git
git remote add b ../b/
git remote
b
origin
git fetch b
git checkout -b b_main b/main
git checkout main
git merge b --allow-unrelated-histories
git status
git add --all
git commit -m ""
git push origin main