If you wanted to verify a merge of the upstream secp256k1 repo into bitcoin/bitcoin. i.e PR #22448.
pushd bitcoin
git fetch upstream pull/22448/head:22448
git checkout 22448
git fetch https://github.com/bitcoin-core/secp256k1
remote: Enumerating objects: 6714, done.
remote: Counting objects: 100% (491/491), done.
remote: Compressing objects: 100% (222/222), done.
remote: Total 6714 (delta 310), reused 371 (delta 268), pack-reused 6223
Receiving objects: 100% (6714/6714), 2.92 MiB | 165.00 KiB/s, done.
Resolving deltas: 100% (4678/4678), done.
From https://github.com/bitcoin-core/secp256k1
* branch HEAD -> FETCH_HEAD
./test/lint/git-subtree-check.sh src/secp256k1
src/secp256k1 in HEAD currently refers to tree b7f4357396a8a5f073bf628567ef10b2e2edd410
src/secp256k1 in HEAD was last updated in commit c020cbaa5c8e9e61b2b8efd8dc09be743fcd4273 (tree b7f4357396a8a5f073bf628567ef10b2e2edd410)
GOOD- bitcoin/bitcoin#29493
- bitcoin/bitcoin#25836
- bitcoin/bitcoin#23133
- bitcoin/bitcoin#20603
- bitcoin/bitcoin#17398
- bitcoin/bitcoin#24461
- bitcoin/bitcoin#17398
- bitcoin/bitcoin#15270
- bitcoin/bitcoin#13925
- bitcoin/bitcoin#12451
- bitcoin/bitcoin#2702
- bitcoin/bitcoin#2916
- bitcoin/bitcoin#30845
- bitcoin/bitcoin#30573
- bitcoin/bitcoin#30334
- bitcoin/bitcoin#30120
- bitcoin/bitcoin#29803
- bitcoin/bitcoin#29169
- bitcoin/bitcoin#28404
- bitcoin/bitcoin#28093
- bitcoin/bitcoin#27479
- bitcoin/bitcoin#27445
- bitcoin/bitcoin#27230
- bitcoin/bitcoin#24792
- bitcoin/bitcoin#23383
- bitcoin/bitcoin#22448
- bitcoin/bitcoin#20257
- bitcoin/bitcoin#20147
- bitcoin/bitcoin#19944
- bitcoin/bitcoin#19228
- bitcoin/bitcoin#15703
- bitcoin/bitcoin#11421
- bitcoin/bitcoin#8453