$ git clone -n https://src.fedoraproject.org/rpms/libwpe.git /var/lib/mock/f41-build-side-1-2647809-27311/root/chroot_tmpdir/scmroot/libwpe
Cloning into '/var/lib/mock/f41-build-side-1-2647809-27311/root/chroot_tmpdir/scmroot/libwpe'...
$ git fetch origin e92cc2d47346a6293a5dc40e3b20f96052adcf21:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libwpe
 * [new ref]         e92cc2d47346a6293a5dc40e3b20f96052adcf21 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e92cc2d Really no longer used by any Fedora packages