$ git clone -n https://src.fedoraproject.org/rpms/perl-XML-Rules.git /var/lib/mock/f41-build-1046750-19100/root/chroot_tmpdir/scmroot/perl-XML-Rules
Cloning into '/var/lib/mock/f41-build-1046750-19100/root/chroot_tmpdir/scmroot/perl-XML-Rules'...
$ git fetch origin 2d958cb1ff2983d7d2382eb4698253881a1a5b63:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-XML-Rules
 * [new ref]         2d958cb1ff2983d7d2382eb4698253881a1a5b63 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2d958cb Eliminate use of obsolete %patchN syntax (#2283636)