$ git clone -n https://src.fedoraproject.org/rpms/xfce4-pulseaudio-plugin.git /var/lib/mock/f42-build-side-1-3540020-46572/root/chroot_tmpdir/scmroot/xfce4-pulseaudio-plugin
Cloning into '/var/lib/mock/f42-build-side-1-3540020-46572/root/chroot_tmpdir/scmroot/xfce4-pulseaudio-plugin'...
$ git fetch origin e11cce9269448f18d43425d9904dc3552331884a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xfce4-pulseaudio-plugin
 * [new ref]         e11cce9269448f18d43425d9904dc3552331884a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e11cce9 Update to v0.5.1; switch to meson