/* Parent is the first parent of the commit. We may name it
* as (n+1)th generation ancestor of the same head_name as
/* Parent is the first parent of the commit. We may name it
* as (n+1)th generation ancestor of the same head_name as
* number is better than the name it already has.
*/
static void name_parent(struct commit *commit, struct commit *parent)
* number is better than the name it already has.
*/
static void name_parent(struct commit *commit, struct commit *parent)