$ git clone -n https://src.fedoraproject.org/rpms/hercules.git /var/lib/mock/f41-build-1065801-19550/root/chroot_tmpdir/scmroot/hercules
Cloning into '/var/lib/mock/f41-build-1065801-19550/root/chroot_tmpdir/scmroot/hercules'...
$ git fetch origin ff63c864c182988edd682748c9ba089b89b4f176:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/hercules
 * [new ref]         ff63c864c182988edd682748c9ba089b89b4f176 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ff63c86 Eliminate use of obsolete %patchN syntax (#2283636)