$ sudo docker image build leidos:reproducer . --file ./Dockerfile

$ sudo docker container run -it --name test_rebuild leidos:reproducer /bin/bash

bash-5.1# sha256sum /usr/share/shim/15.4/x64/shimx64.efi 
34115e2d8a0cc538a76a2eeeca65b63d0e4fa1604bb5c238c972e029e1fc5d84  /usr/share/shim/15.4/x64/shimx64.efi

test@comp-gen-intel ~ $ sudo docker container cp test_rebuild:/usr/share/shim/15.4/x64/shimx64.efi ./shimx64.efi.rebuilt

test@comp-gen-intel shim-review $ sha256sum ./shimx64.efi ./shimx64.efi.rebuilt 
ba0fe814dc482a4cca9f2c3f70e73efef674456d68d416d371130b30dcb067f8  ./shimx64.efi
34115e2d8a0cc538a76a2eeeca65b63d0e4fa1604bb5c238c972e029e1fc5d84  ./shimx64.efi.rebuilt

test@comp-gen-intel shim-review $ diff -y --width=180 --suppress-common-lines orig.hexdump rebuilt.hexdump 
000000d0  00 d0 0c 00 00 04 00 00  c5 45 0e 00 0a 00 00 00  |.........E......|	      |	000000d0  00 d0 0c 00 00 04 00 00  3b 8a 0e 00 0a 00 00 00  |........;.......|
00000200  2f 31 34 00 00 00 00 00  ae 00 00 00 00 10 08 00  |/14.............|	      |	00000200  2f 31 34 00 00 00 00 00  b4 00 00 00 00 10 08 00  |/14.............|
00079a30  78 38 36 5f 36 34 20 49  6e 74 65 6c 28 52 29 20  |x86_64 Intel(R) |	      |	00079a30  78 38 36 5f 36 34 20 31  31 74 68 20 47 65 6e 20  |x86_64 11th Gen |
00079a40  43 6f 72 65 28 54 4d 29  20 69 37 2d 37 38 32 30  |Core(TM) i7-7820|	      |	00079a40  49 6e 74 65 6c 28 52 29  20 43 6f 72 65 28 54 4d  |Intel(R) Core(TM|
00079a50  58 20 43 50 55 20 40 20  33 2e 36 30 47 48 7a 20  |X CPU @ 3.60GHz |	      |	00079a50  29 20 69 37 2d 31 31 36  35 47 37 20 40 20 32 2e  |) i7-1165G7 @ 2.|
00079a60  47 65 6e 75 69 6e 65 49  6e 74 65 6c 20 47 4e 55  |GenuineIntel GNU|	      |	00079a60  38 30 47 48 7a 20 47 65  6e 75 69 6e 65 49 6e 74  |80GHz GenuineInt|
00079a70  2f 4c 69 6e 75 78 20 24  0a 24 43 6f 6d 6d 69 74  |/Linux $.$Commit|	      |	00079a70  65 6c 20 47 4e 55 2f 4c  69 6e 75 78 20 24 0a 24  |el GNU/Linux $.$|
00079a80  3a 20 32 30 65 34 64 39  34 38 36 66 63 61 65 35  |: 20e4d9486fcae5|	      |	00079a80  43 6f 6d 6d 69 74 3a 20  32 30 65 34 64 39 34 38  |Commit: 20e4d948|
00079a90  34 65 65 34 34 64 32 33  32 33 61 65 33 34 32 66  |4ee44d2323ae342f|	      |	00079a90  36 66 63 61 65 35 34 65  65 34 34 64 32 33 32 33  |6fcae54ee44d2323|
00079aa0  66 65 36 38 63 39 32 30  65 36 20 24 0a 00 00 00  |fe68c920e6 $....|	      |	00079aa0  61 65 33 34 32 66 66 65  36 38 63 39 32 30 65 36  |ae342ffe68c920e6|
00079ab0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|	      |	00079ab0  20 24 0a 00 00 00 00 00  00 00 00 00 00 00 00 00  | $..............|
										      >	00079ac0  00 00 00 00 00 00 00 00  00 00 00 00 00 00 00 00  |................|