$ git clone -n https://src.fedoraproject.org/rpms/python-flufl-bounce.git /var/lib/mock/f45-build-30736-647/root/chroot_tmpdir/scmroot/python-flufl-bounce
Cloning into '/var/lib/mock/f45-build-30736-647/root/chroot_tmpdir/scmroot/python-flufl-bounce'...
$ git fetch origin d76aeb2e4c0f2b47e4c1dc60117be924bae75da1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-flufl-bounce
 * [new ref]         d76aeb2e4c0f2b47e4c1dc60117be924bae75da1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d76aeb2 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild