added fco_preview: might be really bad code, but it "works for me!"

Examples.md

@@ -385,6 +385,24 @@ fco() {
     fzf-tmux -l30 -- --no-hscroll --ansi +m -d "\t" -n 2) || return
   git checkout $(echo "$target" | awk '{print $2}')
 }
+
+
+# fco_preview - checkout git branch/tag, with a preview showing the commits between the tag/branch and HEAD
+fco_preview() {
+  local tags branches target
+  tags=$(
+git tag | awk '{print "\x1b[31;1mtag\x1b[m\t" $1}') || return
+  branches=$(
+git branch --all | grep -v HEAD |
+sed "s/.* //" | sed "s#remotes/[^/]*/##" |
+sort -u | awk '{print "\x1b[34;1mbranch\x1b[m\t" $1}') || return
+  target=$(
+(echo "$tags"; echo "$branches") |
+    fzf --no-hscroll --no-multi --delimiter="\t" -n 2 \
+        --preview="git log -200 --pretty=format:%s $(echo {+2..} |  sed 's/$/../' )" ) || return
+  git checkout $(echo "$target" | awk '{print $2}')
+}
+
 ```
 
 ```sh
@@ -919,4 +937,3 @@ zle -N _fzf_marker_placeholder_widget
 bindkey "${FZF_MARKER_MAIN_KEY:-\C-@}" _fzf_marker_main_widget
 bindkey "${FZF_MARKER_PLACEHOLDER_KEY:-\C-v}" _fzf_marker_placeholder_widget
 ```
-