$ git clone -n https://src.fedoraproject.org/rpms/gvfs.git /var/lib/mock/f41-build-side-1-2641683-26732/root/chroot_tmpdir/scmroot/gvfs
Cloning into '/var/lib/mock/f41-build-side-1-2641683-26732/root/chroot_tmpdir/scmroot/gvfs'...
$ git fetch origin 5df28394e29c42e3fb330e3048a3c3a79dac232e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gvfs
 * [new ref]         5df28394e29c42e3fb330e3048a3c3a79dac232e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5df2839 Update to 1.55.90