Pycharm as a default git difftool and git mergetool. Add the following to ~/.gitconfig
[diff]
tool = pycharm
[difftool "pycharm"]
cmd = /usr/local/bin/pycharm diff "$LOCAL" "$REMOTE" && echo "Press enter to continue..." && read
[merge]
tool = pycharm
keepBackup = false
[mergetool "pycharm"]
cmd = /usr/local/bin/pycharm merge "$LOCAL" "$REMOTE" "$BASE" "$MERGED"