$ git clone -n https://src.fedoraproject.org/rpms/usbmuxd.git /var/lib/mock/f41-build-side-1-2778939-32451/root/chroot_tmpdir/scmroot/usbmuxd
Cloning into '/var/lib/mock/f41-build-side-1-2778939-32451/root/chroot_tmpdir/scmroot/usbmuxd'...
$ git fetch origin 8908056f9a3621a08e1612e7ae137ac965f31ded:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/usbmuxd
 * [new ref]         8908056f9a3621a08e1612e7ae137ac965f31ded -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8908056 Update to git snapshot 0b1b233