https://www.atlassian.com/git/tutorials/git-log/

git log
    --all
        from all the branches
    --all --simplify-by-decoration
        show only commits that are tagged, branched, etc

    --oneline
        single-line log
    --graph
        log in a graph form
    --decorate
        add a ref-names to the tree
    --pretty="%h, %cn, %cr"
        pretty-printed log accrording to the specified format
        https://www.kernel.org/pub/software/scm/git/docs/git-log.html#_pretty_formats

        %an - committer name
        %cn - committer name
        %h  - hash
        %cd - commit date
        %cr - commit date relative
        %s  - ???
        %x09- tab

    --patch <filename>
        show history of a single file
    --stat   ...
        files + statistics (number of changed files, number of changed/deleted/modified lines)

    --name-status
        list modified files

    -p
        includes the diff on the file at each commit

    --show-signature
        show gpg signature


Filtering the commit history

git log
    -<N>
        top <N> commits

    HEAD^
        except the top-one commit (HEAD)

    HEAD~3
        except the top 3 commits

    --after/--before="2015-7-1", "yesterday"
    --since/--untill
        filter by date

    --author="<regex>"
        by author

    --grep="<regex>" [-i]
        by commit message


    -- file1 file2
        by file1 or file2
    -- folder/subfolder
        by subfolder

    -S"msg" [--patch]
    -G"<regex>"
        by content (pickaxe) (--patch for statistics)

    <since>..<untill>
        by range (<since> and <untill> are commit messages here)
        in particular:
            <branch1>..<branch2> --oneline
                difference between branch1 and branch2
            <branch>..
                changes made locally, but not pushed
            ..<remote-branch>
                ???

    --no-merges
        exclude merge commits
    --merges
        merge commits only

    -L 6,13:<file>
        log changes of certain lines of the <file>


we can combine ... --oneline --graph --all --decorate

git shortlog
    Summarizes git log output in a format suitable for inclusion in release announcements. Each commit will be grouped by author and title.
    -n
        to sort by the number of commits per author

Samples:
git log --author="Ihar Hancharenka" --oneline
git log --pretty=format:"%h%x09%aN%x09%s"

git log --name-status --diff-filter="ACDMRT" -1 -U <commit-hash>