问题
I have readonly access to repo A and have my own repo B.
Repo A contained multiple branches A1, A2 etc repo B has branches B1, B2 etc. Both repo A and repo B has remotes
Repo A branch A1 equal to repo B branch B1 folder F so how can I merge all changes from repo A branch A1 to repo B branch B1 folder F using git command by keeping all the history?
Currently I am just copying the files manually by overriding the content on B1 folder F which is not right I believe.
UPDATE what I've done so far:
1) on branch B directory i run a command git remote add A path/to/A
2) then git fetch A so I've got all stuff from repo A in my repo B
So the question now how can I merge branch A1 to branch B folder F
there is a command git merge A/A1 but how can I specify that I want to merge branch A1 to branch B1 folder F in that command ?
来源：https://stackoverflow.com/questions/35590795/merge-code-between-two-dfferent-git-repositories