$ git clone -n https://src.fedoraproject.org/rpms/perl-Event-RPC.git /var/lib/mock/f41-build-1153705-21307/root/chroot_tmpdir/scmroot/perl-Event-RPC
Cloning into '/var/lib/mock/f41-build-1153705-21307/root/chroot_tmpdir/scmroot/perl-Event-RPC'...
$ git fetch origin 6a57bd5675cd9d467405f383a26fe5a054508d79:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Event-RPC
 * [new ref]         6a57bd5675cd9d467405f383a26fe5a054508d79 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6a57bd5 Eliminate use of obsolete %patchN syntax (#2283636)