$ git clone -n https://src.fedoraproject.org/rpms/python-jellyfish.git /var/lib/mock/f45-build-31254-651/root/chroot_tmpdir/scmroot/python-jellyfish
Cloning into '/var/lib/mock/f45-build-31254-651/root/chroot_tmpdir/scmroot/python-jellyfish'...
$ git fetch origin 43f7a1eaff629ea834616da75ad701556056f6e0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-jellyfish
 * [new ref]         43f7a1eaff629ea834616da75ad701556056f6e0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 43f7a1e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild