$ git clone -n https://src.fedoraproject.org/rpms/zsync.git /var/lib/mock/f45-build-39429-735/root/chroot_tmpdir/scmroot/zsync
Cloning into '/var/lib/mock/f45-build-39429-735/root/chroot_tmpdir/scmroot/zsync'...
$ git fetch origin 03e9524e54a307c8f19681c9dca99cf1be308690:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/zsync
 * [new ref]         03e9524e54a307c8f19681c9dca99cf1be308690 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 03e9524 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild