Re: [PATCH 5/5] branch: show more information when HEAD is detached

> This prints more helpful info when HEAD is detached: is it detached
> because of bisect or rebase? What is the original branch name in those
> cases? Is it detached because the user checks out a remote ref or a
> tag (and which one)?
>
> Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
> ---
>  builtin/branch.c            | 25 ++++++++++++++++++++++++-
>  t/t6030-bisect-porcelain.sh |  2 +-
>  2 files changed, 25 insertions(+), 2 deletions(-)
>
> diff --git a/builtin/branch.c b/builtin/branch.c
> index 6371bf9..02dee0d 100644
> --- a/builtin/branch.c
> +++ b/builtin/branch.c
> @@ -18,6 +18,7 @@
>  #include "string-list.h"
>  #include "column.h"
>  #include "utf8.h"
> +#include "wt-status.h"
>  
>  static const char * const builtin_branch_usage[] = {
>  	N_("git branch [options] [-r | -a] [--merged | --no-merged]"),
> @@ -550,6 +551,28 @@ static int calc_maxwidth(struct ref_list *refs)
>  	return w;
>  }
>  
> +static char *get_head_description()