$ git clone -n https://src.fedoraproject.org/rpms/folio.git /var/lib/mock/f42-build-side-1-3501841-45976/root/chroot_tmpdir/scmroot/folio
Cloning into '/var/lib/mock/f42-build-side-1-3501841-45976/root/chroot_tmpdir/scmroot/folio'...
$ git fetch origin 1007f1bb73b5b1123e8149441e59e2bb0c0c01ab:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/folio
 * [new ref]         1007f1bb73b5b1123e8149441e59e2bb0c0c01ab -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1007f1b Fix GTK init