$ git clone -n https://src.fedoraproject.org/rpms/mythes-nl.git /var/lib/mock/f45-build-19430-549/root/chroot_tmpdir/scmroot/mythes-nl
Cloning into '/var/lib/mock/f45-build-19430-549/root/chroot_tmpdir/scmroot/mythes-nl'...
$ git fetch origin 456c37902ff9ea83e9451f71196e6ee16063c566:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mythes-nl
 * [new ref]         456c37902ff9ea83e9451f71196e6ee16063c566 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 456c379 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild