configuration option `commit.template` is set); `merge` (if the
commit is a merge or a `.git/MERGE_MSG` file exists); `squash`
(if a `.git/SQUASH_MSG` file exists); or `commit`, followed by
-a commit SHA1 (if a `-c`, `-C` or `--amend` option was given).
+a commit SHA-1 (if a `-c`, `-C` or `--amend` option was given).
If the exit status is non-zero, 'git commit' will abort.
refs/heads/master 67890 refs/heads/foreign 12345
-although the full, 40-character SHA1s would be supplied. If the foreign ref
-does not yet exist the `<remote SHA1>` will be 40 `0`. If a ref is to be
+although the full, 40-character SHA-1s would be supplied. If the foreign ref
+does not yet exist the `<remote SHA-1>` will be 40 `0`. If a ref is to be
deleted, the `<local ref>` will be supplied as `(delete)` and the `<local
-SHA1>` will be 40 `0`. If the local commit was specified by something other
-than a name which could be expanded (such as `HEAD~`, or a SHA1) it will be
+SHA-1>` will be 40 `0`. If the local commit was specified by something other
+than a name which could be expanded (such as `HEAD~`, or a SHA-1) it will be
supplied as it was originally given.
If this hook exits with a non-zero status, 'git push' will abort without
- the name of the ref being updated,
- the old object name stored in the ref,
- - and the new objectname to be stored in the ref.
+ - and the new object name to be stored in the ref.
A zero exit from the update hook allows the ref to be updated.
Exiting with a non-zero status prevents 'git-receive-pack'