Not your everyday git commands, but useful in aliases and scripts.

Get commit hash

Commit reference is required for both below.

Single

Using git rev-parse.

$ git rev-parse HEAD 
9641372537f8025591b8808c6f9194f211062394

$ git rev-parse --short HEAD 
9641372

Range

Using git rev-list.

$ g rev-list HEAD
8ac5f926afaeca7287dff1fb1528a085a30e0658
1190aedff7d744e238c90c2a00ba47dea11affa5
bdee52478edb26e3cfe96002e0f923f94d1e5798
177a4f43eb17a07fe87519030ffd59898ff4e8ed
47ca81d79395cc655430e68285911a26c0f39ee4
...

$ g rev-list -n 2 HEAD
dc17e80907f0a9d809b0997baf4114bc2b8338f7
cd037a2c5c61840b6cd9985fd7205db808ff5dfe

Get commit details

Single commit

Show summary of a commit and the diff.

Defaults to the current commit.

Using git show.

$ git show

commit dc17e80907f0a9d809b0997baf4114bc2b8338f7 (HEAD -> master, origin/master, origin/HEAD)
Author: Michael Currin <18750745+MichaelCurrin@users.noreply.github.com>
Date:   Wed Jun 2 12:07:45 2021 +0200

    refactor: update prepareCommitMsg.ts

diff --git a/src/prepareCommitMsg.ts b/src/prepareCommitMsg.ts
index 230a716..b7dc357 100644

Range of commits

Using git log.

From latest commit

$ git log

Show diff

$ git log -p

Compare branches or remote

$ git log main origin/main

$ git log main my-feature

Path

$ git log my-dir

$ git log my-file.txt

Show diff

Using git diff.

Only shows uncommit changes.

$ git diff

Show history.

$ git diff HEAD~

$ git diff HEAD~5..HEAD~2

$ git diff main my-feat