$ git clone -n https://src.fedoraproject.org/rpms/oxygen-sounds.git /var/lib/mock/f42-build-3340332-44984/root/chroot_tmpdir/scmroot/oxygen-sounds
Cloning into '/var/lib/mock/f42-build-3340332-44984/root/chroot_tmpdir/scmroot/oxygen-sounds'...
$ git fetch origin 5e1f8ce9058ee68b34863b5c977bd13131ce4acc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/oxygen-sounds
 * [new ref]         5e1f8ce9058ee68b34863b5c977bd13131ce4acc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5e1f8ce 6.3.2