$ git clone -n https://src.fedoraproject.org/rpms/perl-IO-Event.git /var/lib/mock/f41-build-766299-13472/root/chroot_tmpdir/scmroot/perl-IO-Event
Cloning into '/var/lib/mock/f41-build-766299-13472/root/chroot_tmpdir/scmroot/perl-IO-Event'...
$ git fetch origin 31a01d80e86fbed481df0c011793e08e285e1a9e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-IO-Event
 * [new ref]         31a01d80e86fbed481df0c011793e08e285e1a9e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 31a01d8 Eliminate use of obsolete %patchN syntax (#2283636)