$ git clone -n https://src.fedoraproject.org/rpms/smatch.git /var/lib/mock/f42-build-3273301-41310/root/chroot_tmpdir/scmroot/smatch
Cloning into '/var/lib/mock/f42-build-3273301-41310/root/chroot_tmpdir/scmroot/smatch'...
$ git fetch origin d4bf323f1ac0b1257640a06ea55e62ece6626c9c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/smatch
 * [new ref]         d4bf323f1ac0b1257640a06ea55e62ece6626c9c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d4bf323 force gnu99 everywhere to fix FTBFS with GCC 15