`hooks.allownonascii` config option unset or set to false--prevents
the use of non-ASCII filenames.
+pre-merge-commit
+~~~~~~~~~~~~~~~~
+
+This hook is invoked by linkgit:git-merge[1], and can be bypassed
+with the `--no-verify` option. It takes no parameters, and is
+invoked after the merge has been carried out successfully and before
+obtaining the proposed commit log message to
+make a commit. Exiting with a non-zero status from this script
+causes the `git merge` command to abort before creating a commit.
+
+The default 'pre-merge-commit' hook, when enabled, runs the
+'pre-commit' hook, if the latter is enabled.
+
+This hook is invoked with the environment variable
+`GIT_EDITOR=:` if the command will not bring up an editor
+to modify the commit message.
+
+If the merge cannot be carried out automatically, the conflicts
+need to be resolved and the result committed separately (see
+linkgit:git-merge[1]). At that point, this hook will not be executed,
+but the 'pre-commit' hook will, if it is enabled.
+
prepare-commit-msg
~~~~~~~~~~~~~~~~~~
post-checkout
~~~~~~~~~~~~~
-This hook is invoked when a linkgit:git-checkout[1] is run after having updated the
+This hook is invoked when a linkgit:git-checkout[1] or
+linkgit:git-switch[1] is run after having updated the
worktree. The hook is given three parameters: the ref of the previous HEAD,
the ref of the new HEAD (which may or may not have changed), and a flag
indicating whether the checkout was a branch checkout (changing branches,
flag=1) or a file checkout (retrieving a file from the index, flag=0).
-This hook cannot affect the outcome of `git checkout`.
+This hook cannot affect the outcome of `git switch` or `git checkout`.
It is also run after linkgit:git-clone[1], unless the `--no-checkout` (`-n`) option is
used. The first parameter given to the hook is the null-ref, the second the
For example, the hook can simply run `git read-tree -u -m HEAD "$1"`
in order to emulate `git fetch` that is run in the reverse direction
with `git push`, as the two-tree form of `git read-tree -u -m` is
-essentially the same as `git checkout` that switches branches while
+essentially the same as `git switch` or `git checkout`
+that switches branches while
keeping the local changes in the working tree that do not interfere
with the difference between the branches.