git grep

git --no-pager grep your-text-to-search $(git rev-list --all)
git grep your-text-to-search $(git rev-list --all)

• https://stackoverflow.com/questions/tagged/git-grep?tab=Votes
• https://git-scm.com/docs/git-grep

Related

git log -p --all -S

See also

• git grep
• ack, ag, grep, egrep, fgrep, agrep, ngrep, pgrep, awk, sed, strings, tr, tail, mtail, git grep, wc, uniq, LogQL, findstr (Windows), rg, git-grep, cut