$ git clone -n https://src.fedoraproject.org/rpms/pipepanic.git /var/lib/mock/f45-build-28534-631/root/chroot_tmpdir/scmroot/pipepanic
Cloning into '/var/lib/mock/f45-build-28534-631/root/chroot_tmpdir/scmroot/pipepanic'...
$ git fetch origin 564253d31cff33bbeaa59a290fde6a5576240511:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/pipepanic
 * [new ref]         564253d31cff33bbeaa59a290fde6a5576240511 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 564253d Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild