$ git clone -n https://src.fedoraproject.org/rpms/foonathan-memory.git /var/lib/mock/f45-build-9173-399/root/chroot_tmpdir/scmroot/foonathan-memory
Cloning into '/var/lib/mock/f45-build-9173-399/root/chroot_tmpdir/scmroot/foonathan-memory'...
$ git fetch origin ba3929b93d176ef359a4c24e5ee99fdf6b1095be:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/foonathan-memory
 * [new ref]         ba3929b93d176ef359a4c24e5ee99fdf6b1095be -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ba3929b Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild