Git alias:
# Find text in any commit ever.
grep-all = !"f() { git rev-list --all | xargs git grep \"$@\"; }; f"
# Find text and group the output lines. A.k.a. `grave;gg`grave;.
grep-group = grep --break --heading --line-number --color
# Find text with ack-like formatting.
grep-ack = \
-c color.grep.linenumber=\"bold yellow\" \
-c color.grep.filename=\"bold green\" \
-c color.grep.match=\"reverse yellow\" \
grep --break --heading --line-number
Example:
git grep-all
git grep-group
git grep-ack