$ git clone -n https://src.fedoraproject.org/rpms/zeitgeist.git /var/lib/mock/f45-build-39329-733/root/chroot_tmpdir/scmroot/zeitgeist
Cloning into '/var/lib/mock/f45-build-39329-733/root/chroot_tmpdir/scmroot/zeitgeist'...
$ git fetch origin 1b163f7eac036bb9c9cc0fe3405b2b43c0ce50bf:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/zeitgeist
 * [new ref]         1b163f7eac036bb9c9cc0fe3405b2b43c0ce50bf -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1b163f7 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild