$ git clone -n https://src.fedoraproject.org/rpms/perl-GraphViz.git /var/lib/mock/f41-build-1099141-20020/root/chroot_tmpdir/scmroot/perl-GraphViz
Cloning into '/var/lib/mock/f41-build-1099141-20020/root/chroot_tmpdir/scmroot/perl-GraphViz'...
$ git fetch origin dca306b2c325c48fa88d2b12148e7ff66e77253f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-GraphViz
 * [new ref]         dca306b2c325c48fa88d2b12148e7ff66e77253f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dca306b Eliminate use of obsolete %patchN syntax (#2283636)