$ git clone -n https://src.fedoraproject.org/rpms/python-tomlkit.git /var/lib/mock/f40-build-2204489-51961/root/chroot_tmpdir/scmroot/python-tomlkit
Cloning into '/var/lib/mock/f40-build-2204489-51961/root/chroot_tmpdir/scmroot/python-tomlkit'...
$ git fetch origin eacf781717e036b17b51e46b41477b29d42120dd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-tomlkit
 * [new ref]         eacf781717e036b17b51e46b41477b29d42120dd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at eacf781 Update to 0.12.3. Fixes rhbz#2249729.