This file contains instructions on how to change your hairstyle (woman only at this time) and a complete hairstyle list. Shortly, male hair changes will come.

This hex editing process can be used until the CD project is able to change the hairstyles of your woman (male soon) character at any given time in the game and for any save file.
This file contains instructions (the same as below) and a Hairstyle Reference text file that contains the hex values for the 38 hairstyles of women (excluding #39 completely bald).
Please note that you initially created your hairstyle #39 (fully bald) character, at this point in time you cannot change your hair.
Also note that although all hairstyles can be changed among male/female, most hairstyles don't fit on the opposite sex because of the head sizes of the model.

Instructions:
1) Locate your sav.dat save file you would like to modify. Location should be C:\Users\"USERNAME"\Saved Games\CD Projekt Red\Cyberpunk 2077
2) !! MAKE A BACKUP OF YOUR sav.dat FILE !!
3) Download and install a Hex editing program such as HxD (site here)
     The rest of the instructions are based on HxD. Other hex editing programs may work differently
4) Start HxD and drag the sav.dat file to the program window or choose file > open > "browse to your sav.dat file"
5) Using the included Female_Hairstyles.txt as reference, locate your current hair style string using Find(ctrl+f) > Hex-values > "hairstyle string here"
    For example: If you created your character with hairstyle # 21: Find(ctrl+f) > hex-values > 3F 28 5C 0B AF 8A C1 0B
    If you do not know which hairstyle # you chose during initial character creation, you will have to search each style string until you find yours
6) Replace your current hairstyle string with the style of your choosing using the included Female_Hairstyles.txt
    Either copy/paste over the string of Hex values..
    Or Replace(ctrl+r) > Hex-values > Find: "current hairstyle string" > Replace with: "desired hairstyle string"
7) Save the modifed sav.dat file
8) Load/reload your save file. No need to relaunch the game
That's it!
You can change as often as you like.
Enjoy.

Credits:
woodbricks