$ git clone -n https://src.fedoraproject.org/rpms/gnome-software.git /var/lib/mock/f40-build-2208327-52127/root/chroot_tmpdir/scmroot/gnome-software
Cloning into '/var/lib/mock/f40-build-2208327-52127/root/chroot_tmpdir/scmroot/gnome-software'...
$ git fetch origin ef76ba99411e0057ac5ccfd88df8307a1beff187:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gnome-software
 * [new ref]         ef76ba99411e0057ac5ccfd88df8307a1beff187 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ef76ba9 Update to 46.alpha