How to exclude commits from git?

of course you can revert

git revert <SHA of erroneous commit>

or, you can rewrite the complete history BUT this will update all SHA which can be dangerous (if someone else is allready working on the branch)

for this you would have to freeze the others developpers to work during this

git checkout branchA   // one of the problematic branch
git rebase -i <sha1 befor the pb>
-->   mark the "remove ignored file" commit as `edit`
// this will stop into the "guilty commit"
// at this point we undo the commit 
git reset HEAD^ 
// and then redo do the job like it should have 
....
// including the  "git commit "
// you can even do more than one git "commit"
git rebase --continue

// then 
git push -f origin branchA

Other dev can now pull again

Note : to do it more safely you can create a work branch and drop it if result is not as expected

git checkout branchA   // one of the problematic branch
git checkout -b branchA-before-rework // just in case

git checkout -b A-rework-1
git revert <SHA1 erroneous commit>

// ? happy :)
git branch -f branchA   // will force branchA to here
git push -f origin branchA
// not happy try something else

git checkout branchA   // one of the problematic branch
git checkout -b A-rework-2
// do above "git rebase -i" stuff EXCEPT push -f
// ? not happy drop it
git checkout branchA   // one of the problematic branch
git checkout -b A-rework-n
// ? happy :)
git branch -f branchA   // will force branchA to here
git push -f origin branchA