$ git clone -n https://src.fedoraproject.org/rpms/usbmuxd.git /var/lib/mock/f42-build-side-1-3499388-45964/root/chroot_tmpdir/scmroot/usbmuxd
Cloning into '/var/lib/mock/f42-build-side-1-3499388-45964/root/chroot_tmpdir/scmroot/usbmuxd'...
$ git fetch origin 946bef4ff7e09355a3f0c3a93a8bb7457d7a5d44:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/usbmuxd
 * [new ref]         946bef4ff7e09355a3f0c3a93a8bb7457d7a5d44 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 946bef4 Take ownership of /var/lib/lockdown and add compat sysusers macros