$ git clone -n https://src.fedoraproject.org/rpms/lxtask.git /var/lib/mock/f40-build-2009814-45522/root/chroot_tmpdir/scmroot/lxtask
Cloning into '/var/lib/mock/f40-build-2009814-45522/root/chroot_tmpdir/scmroot/lxtask'...
$ git fetch origin c39fe93669013cbe9c054f9c9e240c9b3f07ba7d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/lxtask
 * [new ref]         c39fe93669013cbe9c054f9c9e240c9b3f07ba7d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c39fe93 misc fix