How to switch to https://github.com/nrfconnect/sdk-zephyr main branch in ncs/v2.0.2?

[Wols]

After 

west init -m github.com/.../sdk-nrf --mr v2.0.2

west update

I notice ncs/v2.0.2/zephyr has huge difference with github.com/.../sdk-zephyr main

Like there is no 52840 overlay in ncs/v2.0.2/zephyr/sample/driver/adc/board.

I try to delete ncs/v2.0.2/zephyr and git clone https://github.com/nrfconnect/sdk-zephy.

But not working still got message:

=== updating zephyr (zephyr):
Updating files: 100% (10642/10642), done.
HEAD is now at be360e7db2 [nrf fromtree] net: openthread: enable default software tx security in 1.3
WARNING: left behind zephyr branch "main"; to rebase onto the new HEAD:
git -C zephyr rebase be360e7db2db7e1f0e9fcac686a08e62e350bf55 main

How can I switch to sdk-zephyr main?

[Wols]

Solved, but got another error.
Just use checkout in ncs/v2.0.2/zephyr, and dont west update again.
    $ git checkout main

After this I add CONFIG_LOG=y , I got this error and still looking for reason.

undefined reference to `log_strdup'

Building C object modules/nrf/subsys/mpsl/init/CMakeFiles/..__nrf__subsys__mpsl__init.dir/mpsl_init.c.obj
In file included from C:\Users\canic\ncs\v2.0.2\zephyr\include\zephyr\logging\log.h:11,
                 from C:\Users\canic\ncs\v2.0.2\nrf\subsys\mpsl\init\mpsl_init.c:10:
C:/Users/canic/ncs/v2.0.2/nrf/subsys/mpsl/init/mpsl_init.c: In function 'm_assert_handler':
C:\Users\canic\ncs\v2.0.2\nrf\subsys\mpsl\init\mpsl_init.c:122:33: warning: implicit declaration of function 'log_strdup' [-Wimplicit-function-declaration]
  122 |  LOG_ERR("MPSL ASSERT: %s, %d", log_strdup(file), line);
      |                                 ^~~~~~~~~~
C:\Users\canic\ncs\v2.0.2\zephyr\include\zephyr\logging\log_core.h:167:11: note: in definition of macro 'Z_LOG_TO_PRINTK'
  167 |         ##__VA_ARGS__); \
      |           ^~~~~~~~~~~
C:\Users\canic\ncs\v2.0.2\zephyr\include\zephyr\logging\log_core.h:252:2: note: in expansion of macro 'Z_LOG2'
  252 |  Z_LOG2(_level, 0, __log_current_const_data, __log_current_dynamic_data, __VA_ARGS__)
      |  ^~~~~~
C:\Users\canic\ncs\v2.0.2\zephyr\include\zephyr\logging\log.h:40:25: note: in expansion of macro 'Z_LOG'
   40 | #define LOG_ERR(...)    Z_LOG(LOG_LEVEL_ERR, __VA_ARGS__)
      |                         ^~~~~
C:\Users\canic\ncs\v2.0.2\nrf\subsys\mpsl\init\mpsl_init.c:122:2: note: in expansion of macro 'LOG_ERR'
  122 |  LOG_ERR("MPSL ASSERT: %s, %d", log_strdup(file), line);
      |  ^~~~~~~
C:\Users\canic\ncs\v2.0.2\nrf\subsys\mpsl\init\mpsl_init.c:122:10: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'int' [-Wformat=]
  122 |  LOG_ERR("MPSL ASSERT: %s, %d", log_strdup(file), line);
      |          ^~~~~~~~~~~~~~~~~~~~~  ~~~~~~~~~~~~~~~~
      |                                 |
      |                                 int
C:\Users\canic\ncs\v2.0.2\zephyr\include\zephyr\logging\log_core.h:247:28: note: in definition of macro 'Z_LOG2'
  247 |   z_log_printf_arg_checker(__VA_ARGS__); \
      |                            ^~~~~~~~~~~
C:\Users\canic\ncs\v2.0.2\zephyr\include\zephyr\logging\log.h:40:25: note: in expansion of macro 'Z_LOG'
   40 | #define LOG_ERR(...)    Z_LOG(LOG_LEVEL_ERR, __VA_ARGS__)
      |                         ^~~~~
C:\Users\canic\ncs\v2.0.2\nrf\subsys\mpsl\init\mpsl_init.c:122:2: note: in expansion of macro 'LOG_ERR'
  122 |  LOG_ERR("MPSL ASSERT: %s, %d", log_strdup(file), line);
      |  ^~~~~~~
C:\Users\canic\ncs\v2.0.2\nrf\subsys\mpsl\init\mpsl_init.c:122:25: note: format string is defined here
  122 |  LOG_ERR("MPSL ASSERT: %s, %d", log_strdup(file), line);
      |                        ~^
      |                         |
      |                         char *
      |                        %d