$ git clone -n https://src.fedoraproject.org/rpms/qpid-dispatch.git /var/lib/mock/f41-build-side-1-3135911-39768/root/chroot_tmpdir/scmroot/qpid-dispatch
Cloning into '/var/lib/mock/f41-build-side-1-3135911-39768/root/chroot_tmpdir/scmroot/qpid-dispatch'...
$ git fetch origin bc190106d7c4afe060dd7f429a63d242c222887c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/qpid-dispatch
 * [new ref]         bc190106d7c4afe060dd7f429a63d242c222887c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bc19010 Retired: https://pagure.io/releng/issue/12278