$ git clone -n https://src.fedoraproject.org/rpms/aubio.git /var/lib/mock/f40-build-2586201-62434/root/chroot_tmpdir/scmroot/aubio
Cloning into '/var/lib/mock/f40-build-2586201-62434/root/chroot_tmpdir/scmroot/aubio'...
$ git fetch origin 1b9a9bd758c8261a482350744b6c3397300ec06f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/aubio
 * [new ref]         1b9a9bd758c8261a482350744b6c3397300ec06f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1b9a9bd Fix building on F40+