$ git clone -n https://src.fedoraproject.org/rpms/passt.git /var/lib/mock/f45-build-21425-584/root/chroot_tmpdir/scmroot/passt
Cloning into '/var/lib/mock/f45-build-21425-584/root/chroot_tmpdir/scmroot/passt'...
$ git fetch origin 85a9436a815f01b38662fcb54011b93e96563ae1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/passt
 * [new ref]         85a9436a815f01b38662fcb54011b93e96563ae1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 85a9436 Update to 0^20261002.gcba3570