make a backup of your repo if you aren't sure about this one, because these commands are irreversible.

first, go to your repo directory.

cd myrepo

then recursively search for the conflicted files and delete them

find . -type f -name "* conflicted copy*" -exec rm -f {} \;

lastly, remove any "conflicted" references from git's packed-refs file

awk '!/conflicted/' .git/packed-refs > temp && mv temp .git/packed-refs