See changes before pulling from remote git repository

gistfile1.sh

# fetch the changes from the remote
git fetch origin

# show commit logs of changes
git log master..origin/master

# show diffs of changes
git diff master..origin/master

# apply the changes by merge..
git merge origin/master

# .. or just pull the changes
git pull

Here's a version for current branch
git fetch origin $(current_branch); git log $(current_branch)..origin/$(current_branch); git diff $(current_branch)..origin/$(current_branch)

and as a git alias
diffR = !CURRENT=$(git current) && git fetch origin $CURRENT && git log $CURRENT..origin/$CURRENT && git diff $CURRENT..origin/$CURRENT

Thanks for sharing @reharik @jtdp !! 👐