Currently I am working in a feature branch that will soon be merged back into master. I recently tried just that and had some merge conflicts, which I had to fix manually. <
You can do exactly this in git with the following command, assuming that feature is the name of your feature branch:
git merge -s recursive -X theirs feature
This says to use the "recursive" merge strategy, but with the "theirs" option. This means that when there is a conflict, it will be automatically resolved by taking the version of the hunk from the feature branch, not your current branch. (Note that this is completely different from the "theirs" merge strategy, which has now been removed from git.)
This feature was introduced in git v1.7.0.