$ git clone -n https://src.fedoraproject.org/rpms/python-mypy_extensions.git /var/lib/mock/f45-build-31666-654/root/chroot_tmpdir/scmroot/python-mypy_extensions
Cloning into '/var/lib/mock/f45-build-31666-654/root/chroot_tmpdir/scmroot/python-mypy_extensions'...
$ git fetch origin b8ffac175fd2be857f9fdd93bae099b8138c3884:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-mypy_extensions
 * [new ref]         b8ffac175fd2be857f9fdd93bae099b8138c3884 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b8ffac1 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild