$ git clone -n https://src.fedoraproject.org/rpms/katomic.git /var/lib/mock/f40-build-802836-144115/root/chroot_tmpdir/scmroot/katomic
Cloning into '/var/lib/mock/f40-build-802836-144115/root/chroot_tmpdir/scmroot/katomic'...
$ git fetch origin 2ddd27d890cc33fd7fcba48067a146aa9ee24a0d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/katomic
 * [new ref]         2ddd27d890cc33fd7fcba48067a146aa9ee24a0d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2ddd27d fix: adjust files section