git checkout branch_1 # checkout the oldest branchgit checkout -b compare-branch # create a new branchgit merge --no-commit --squash branch_2 # put files from the new branch in the working foldergit status # see file names that changesgit diff # see the content that changed.
// Fetch from all remotesgit fetch
// Check out your feature branchgit checkout feature
// Merge origin/master to your branchgit merge origin/master
// Compare to origin/mastergit diff origin/master