$ git clone -n https://src.fedoraproject.org/rpms/kakasi.git /var/lib/mock/f42-build-3279306-41337/root/chroot_tmpdir/scmroot/kakasi
Cloning into '/var/lib/mock/f42-build-3279306-41337/root/chroot_tmpdir/scmroot/kakasi'...
$ git fetch origin 826cd5243fdee253397db027b4185304b62c8b4d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/kakasi
 * [new ref]         826cd5243fdee253397db027b4185304b62c8b4d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 826cd52 Fix FTBFS