hg heads [-ac] [-r STARTREV] [REV]...

show current repository heads or show branch heads

    With no arguments, show all repository branch heads.

    Repository "heads" are changesets with no child changesets. They are where
    development generally takes place and are the usual targets for update and
    merge operations. Branch heads are changesets that have no child changeset
    on the same branch.

    If one or more REVs are given, only branch heads on the branches
    associated with the specified changesets are shown. This means that you
    can use "hg heads foo" to see the heads on a branch named "foo".

    If -c/--closed is specified, also show branch heads marked closed (see "hg
    commit --close-branch").

    If STARTREV is specified, only those heads that are descendants of
    STARTREV will be displayed.

    If -t/--topo is specified, named branch mechanics will be ignored and only
    changesets without children will be shown.

    Returns 0 if matching heads are found, 1 if not.


 -r --rev STARTREV      show only heads which are descendants of STARTREV
 -t --topo              show topological heads only
 -c --closed            show normal and closed branch heads
    --style STYLE       display using template map file
    --template TEMPLATE display with template

use "hg -v help heads" to show more info