$ git clone -n https://src.fedoraproject.org/rpms/cpp-jwt.git /var/lib/mock/f40-build-792725-138594/root/chroot_tmpdir/scmroot/cpp-jwt
Cloning into '/var/lib/mock/f40-build-792725-138594/root/chroot_tmpdir/scmroot/cpp-jwt'...
$ git fetch origin 3ddff652ddd3f170cd3f13f81c86709fa985ac19:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cpp-jwt
 * [new ref]         3ddff652ddd3f170cd3f13f81c86709fa985ac19 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3ddff65 Fix side channel vulnerability rhbz#2263329