$ git clone -n https://src.fedoraproject.org/rpms/unzoo.git /var/lib/mock/f45-build-37721-717/root/chroot_tmpdir/scmroot/unzoo
Cloning into '/var/lib/mock/f45-build-37721-717/root/chroot_tmpdir/scmroot/unzoo'...
$ git fetch origin 673e9fe334ccd8bbbb9a63fdf192b27c4f805935:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/unzoo
 * [new ref]         673e9fe334ccd8bbbb9a63fdf192b27c4f805935 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 673e9fe Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild