$ git clone -n https://src.fedoraproject.org/rpms/jday.git /var/lib/mock/f45-build-14363-459/root/chroot_tmpdir/scmroot/jday
Cloning into '/var/lib/mock/f45-build-14363-459/root/chroot_tmpdir/scmroot/jday'...
$ git fetch origin 6177278fd6d442bb6692a4e30e9c4bc235ab1f32:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/jday
 * [new ref]         6177278fd6d442bb6692a4e30e9c4bc235ab1f32 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6177278 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild