$ git clone -n https://src.fedoraproject.org/rpms/libprelude.git /var/lib/mock/f41-build-side-1-3137955-39809/root/chroot_tmpdir/scmroot/libprelude
Cloning into '/var/lib/mock/f41-build-side-1-3137955-39809/root/chroot_tmpdir/scmroot/libprelude'...
$ git fetch origin 85dd2e0e99518519d5411b3d51ab0961f0648efb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libprelude
 * [new ref]         85dd2e0e99518519d5411b3d51ab0961f0648efb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 85dd2e0 Retired: https://pagure.io/releng/issue/12278