$ git clone -n https://src.fedoraproject.org/rpms/libppd.git /var/lib/mock/f41-build-833600-157891/root/chroot_tmpdir/scmroot/libppd
Cloning into '/var/lib/mock/f41-build-833600-157891/root/chroot_tmpdir/scmroot/libppd'...
$ git fetch origin aa65afca9e6a373e22793b90fe2418a032f27391:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libppd
 * [new ref]         aa65afca9e6a373e22793b90fe2418a032f27391 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at aa65afc fix deciding page sizes by changing delta for difference