gistfile1.sh

[alias]
    amend-message = "!bash -c ' \
        c=$0; \
        if [ $c == \"bash\" ]; then echo \"Usage: git amend-message <commit>\"; exit 1; fi; \
        saved_head=$(git rev-parse HEAD); \
        commit=$(git rev-parse $c); \
        commits=$(git log --reverse --pretty=format:%H $commit..HEAD); \
        echo \"Rewinding to $commit...\"; \
        git reset --hard $commit; \
        git commit --amend; \
        for X in $commits; do \
            echo \"Applying $X...\"; \
            git cherry-pick $X >> /dev/null; \
            if [ $? -ne 0 ]; then \
                echo \"  apply failed (is this a merge?), rolling back all changes\"; \
                git reset --hard $saved_head; \
                echo \" ** AMEND-MESSAGE FAILED, sorry\"; \
                exit 1; \
            fi; \
        done; \
        echo \"Done\"'"