Running filter-branch over a range of commits

Question

git filter-branch --env-filter \'
export GIT_AUTHOR_EMAIL=\"foo@example.com\"
export GIT_AUTHOR_NAME=\"foo\"\' -- commita..commitb

Results in

Answer 1

The solution from @Acron seems wrong to me. I would suggest following to change between refa and refb including both hashes:

1. git tag master.bak
2. git reset --hard refa
3. git filter-branch --env-filter ' export GIT_AUTHOR_EMAIL="foo@example.com"' refa^..master
4. git cherry-pick refb..master.bak
5. git tag -d master.bak