$ git clone -n https://src.fedoraproject.org/rpms/arianna.git /var/lib/mock/f40-build-2074179-49392/root/chroot_tmpdir/scmroot/arianna
Cloning into '/var/lib/mock/f40-build-2074179-49392/root/chroot_tmpdir/scmroot/arianna'...
$ git fetch origin 92b695d35595b5596b6fe4aaa12795a5bbe89eb9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/arianna
 * [new ref]         92b695d35595b5596b6fe4aaa12795a5bbe89eb9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 92b695d 24.01.80