$ git clone -n https://src.fedoraproject.org/rpms/wayback.git /var/lib/mock/f45-build-38264-722/root/chroot_tmpdir/scmroot/wayback
Cloning into '/var/lib/mock/f45-build-38264-722/root/chroot_tmpdir/scmroot/wayback'...
$ git fetch origin 890962fe738213cd6e43f80da05c1b3b3582e623:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/wayback
 * [new ref]         890962fe738213cd6e43f80da05c1b3b3582e623 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 890962f Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild