$ git clone -n https://src.fedoraproject.org/rpms/gtts.git /var/lib/mock/f39-build-1461957-33291/root/chroot_tmpdir/scmroot/gtts
Cloning into '/var/lib/mock/f39-build-1461957-33291/root/chroot_tmpdir/scmroot/gtts'...
$ git fetch origin bdf60ae2511d6cf3e9a22974f8c90ef6b2189c84:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gtts
 * [new ref]         bdf60ae2511d6cf3e9a22974f8c90ef6b2189c84 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bdf60ae drop workaround for upstream fixed issue