$ git clone -n https://src.fedoraproject.org/rpms/pptp.git /var/lib/mock/f41-build-1030921-18489/root/chroot_tmpdir/scmroot/pptp
Cloning into '/var/lib/mock/f41-build-1030921-18489/root/chroot_tmpdir/scmroot/pptp'...
$ git fetch origin e75336e10200faea6c912b397fde2b65981f2075:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/pptp
 * [new ref]         e75336e10200faea6c912b397fde2b65981f2075 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e75336e Eliminate use of obsolete %patchN syntax (#2283636)