$ git clone -n https://src.fedoraproject.org/rpms/antlrworks.git /var/lib/mock/f45-build-46721-857/root/chroot_tmpdir/scmroot/antlrworks
Cloning into '/var/lib/mock/f45-build-46721-857/root/chroot_tmpdir/scmroot/antlrworks'...
$ git fetch origin 8e543f47f9c73a768b4e0029e25a1279d5831230:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/antlrworks
 * [new ref]         8e543f47f9c73a768b4e0029e25a1279d5831230 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8e543f4 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild