Git Log

$ git log --since="5 hours" — commits in the last 5 hours
$ git log --before="5 hours" — without commits from the last 5 hours
$ git log <commit marker>..<commit marker> — log for a commit range
$ git log <commit marker>^ — a caret acts like a minus one, you can use multiple carets.
$ git log <commit marker>~2 — two revisions prior to what the hash or tag specifies.
$ git log --pretty=oneline <commit marker>..<commit marker> — a nice way to tighten up the log output.