$ git clone -n https://src.fedoraproject.org/rpms/oxygen-sounds.git /var/lib/mock/f40-build-1179306-21865/root/chroot_tmpdir/scmroot/oxygen-sounds
Cloning into '/var/lib/mock/f40-build-1179306-21865/root/chroot_tmpdir/scmroot/oxygen-sounds'...
$ git fetch origin c7c8e63353490e0307cd77ad621d6da7cc5b82ab:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/oxygen-sounds
 * [new ref]         c7c8e63353490e0307cd77ad621d6da7cc5b82ab -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c7c8e63 6.1.0