$ git clone -n https://src.fedoraproject.org/rpms/perl-Parse-RecDescent.git /var/lib/mock/f41-build-1108033-20090/root/chroot_tmpdir/scmroot/perl-Parse-RecDescent
Cloning into '/var/lib/mock/f41-build-1108033-20090/root/chroot_tmpdir/scmroot/perl-Parse-RecDescent'...
$ git fetch origin 8808b16214ff3e0a7c45a9d2fcfc26e7564f359c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Parse-RecDescent
 * [new ref]         8808b16214ff3e0a7c45a9d2fcfc26e7564f359c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8808b16 Eliminate use of obsolete %patchN syntax (#2283636)