git show

# To show information about the latest commit (message, changes, and other metadata):
git show

# To show information about a given commit:
git show <commit>

# To show information about the commit associated with a given tag:
git show <tag>

# To show information about the 3rd commit from the tip of a branch:
git show <branch>~3

# To show a commit's hash and message in a single line, suppressing the diff output:
git show --oneline -s <commit>