$ git clone -n https://src.fedoraproject.org/rpms/crosswords.git /var/lib/mock/f42-build-3528311-46309/root/chroot_tmpdir/scmroot/crosswords
Cloning into '/var/lib/mock/f42-build-3528311-46309/root/chroot_tmpdir/scmroot/crosswords'...
$ git fetch origin dc570a2a50902b86803f3da3112c75cb687ec919:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/crosswords
 * [new ref]         dc570a2a50902b86803f3da3112c75cb687ec919 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dc570a2 Move GSettings schema for the editor to the main package