# jj

> Jujutsu, a version control system.
> Some subcommands such as `log`, `desc`, `new`, `git`, etc. have their own usage documentation.
> More information: <https://jj-vcs.github.io/jj/latest/cli-reference/>.

- Update description of the revisions specified by given revsets (e.g. `B::D`, `A..D`, `B|C|D`, etc.):

`jj {{[desc|describe]}} {{[-m|--message]}} "{{message}}" {{[-r|--revision]}} {{revsets}}`

- Create a new commit/revision on top of a given revision:

`jj new {{revset}}`

- Create a new merge commit on top of multiple revisions:

`jj new {{revset1 revset2 ...}}`

- Update the working copy to point to a revision:

`jj edit {{revset}}`

- Undo the previous command (which may itself have been `undo`):

`jj undo`

- Execute a jj subcommand without snapshotting the working copy:

`jj --ignore-working-copy {{subcommand}}`

- Execute a jj subcommand at an operation:

`jj {{[--at-op|--at-operation]}} {{operation}} {{subcommand}}`

- Display help for a specific subcommand (like `new`, `commit`, `desc`, etc.):

`jj help {{subcommand}}`