$ git clone -n https://src.fedoraproject.org/rpms/arianna.git /var/lib/mock/f40-build-2260741-54418/root/chroot_tmpdir/scmroot/arianna
Cloning into '/var/lib/mock/f40-build-2260741-54418/root/chroot_tmpdir/scmroot/arianna'...
$ git fetch origin 43682ea3c2b5b984a0e49c4c412a1fb8b93392c8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/arianna
 * [new ref]         43682ea3c2b5b984a0e49c4c412a1fb8b93392c8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 43682ea 24.01.90