$ git clone -n https://src.fedoraproject.org/rpms/oxygen-sounds.git /var/lib/mock/f40-build-2166824-50976/root/chroot_tmpdir/scmroot/oxygen-sounds
Cloning into '/var/lib/mock/f40-build-2166824-50976/root/chroot_tmpdir/scmroot/oxygen-sounds'...
$ git fetch origin eef1b1da0c65e7511a475bad9f0e5c302e345df6:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/oxygen-sounds
 * [new ref]         eef1b1da0c65e7511a475bad9f0e5c302e345df6 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at eef1b1d 5.91.0