shell/fzf: add bin/fzf-git-{log,sha}

shell/fzf/bin/fzf-git-log

@@ -0,0 +1,10 @@
+#!/usr/bin/env bash
+
+git log --graph --color=always \
+    --format="%C(auto)%h%d %s %C(black)%C(bold)%cr" "$@" |
+fzf --ansi --no-sort --reverse --tiebreak=index --bind=ctrl-s:toggle-sort \
+    --bind "ctrl-m:execute:
+              (grep -o '[a-f0-9]\{7\}' | head -1 |
+              xargs -I % sh -c 'git show --color=always % | less -R') << 'FZF-EOF'
+              {}
+FZF-EOF"

shell/fzf/bin/fzf-git-sha

@@ -0,0 +1,11 @@
+#!/usr/bin/env bash
+
+# Retrieves a git commit's SHA, useful for a variety of git commands.
+#
+# Examples:
+#  + git checkout `fzf-git-sha`
+#  + git commit --fixup `fzf-git-sha`
+
+commits=$(git log --color=always --pretty=oneline --abbrev-commit --reverse) &&
+    commit=$(echo "$commits" | fzf --tac +s +m -e --ansi --reverse) &&
+    echo -n $(echo "$commit" | sed "s/ .*//")