.cshrc

# add aliases to use git-fzf method
alias git-fzf 'set arg1 = `echo \!:1* | awk '"'"'{ print $1 }'"'"'`; \\
	       bash -c "source ~/.config/bash/plugins/git-fzf.bash && __git_fzf_bash::$arg1" ; \\
	       '

git-fzf.bash

#!/usr/bin/env bash
# usage:
# - in bash: ./git-fzf [args]
# - add tcsh alias: git-fzf [args]

__git_fzf_bash::info() { printf "%b[info]%b %s\n" '\e[0;32m' '\e[0m' "$@" >&2; }
__git_fzf_bash::warn() { printf "%b[warn]%b %s\n" '\e[0;33m' '\e[0m' "$@" >&2; }
__git_fzf_bash::in_repo() { git rev-parse --is-inside-work-tree >/dev/null; }

hash fzf &> /dev/null || { __git_fzf_bash::warn "FZF command required"; exit 2; }

git_fzf_pager=$(git config core.pager || echo 'cat')

__git_fzf_bash::log() {
  __git_fzf_bash::in_repo || return 1

  local cmd
  local opts

  cmd="echo {} | grep -Eo '[a-f0-9]+' | head -1 | xargs -I% git show --color=always % $* | $git_fzf_pager"
  opts="
  $GIT_FZF_DEFAULT_OPTS
  +s +m --tiebreak=index --preview=\"$cmd\"
  --bind=\"enter:execute($cmd | LESS='-R' less)\"
  --bind=\"ctrl-y:execute-silent(echo {} | grep -Eo '[a-f0-9]+' | lead -1 | tr -d '\n' | pbcopy)\"
  "

  eval "git log --graph --color=always --format='%C(auto)%h%d %s %C(black)%C(bold)%cr' $*" |
    FZF_DEFAULT_OPTS="$opts" fzf
}

__git_fzf_bash::diff() {
  __git_fzf_bash::in_repo || return 1
}

__git_fzf_bash::usage() {
  __git_fzf_bash::in_repo || return 1
}

git_fzf() {
  local args=${1:-}

  if [[ -z $args ]]; then
    __git_fzf_bash::usage
    return
  fi
  type __git_fzf_bash::$args &>/dev/null && __git_fzf_bash::$args || __git_fzf_bash::usage
}

GIT_FZF_DEFAULT_OPTS="
$FZF_DEFAULT_OPS
--ansi
--height='80%'
--preview-window='right:60%'
$GIT_FZF_DEFAULT_OPTS
"

git_fzf "$1"

Idea from: forgit