$ git clone -n https://src.fedoraproject.org/rpms/perl-Gnome2-Canvas.git /var/lib/mock/f41-build-816603-150289/root/chroot_tmpdir/scmroot/perl-Gnome2-Canvas
Cloning into '/var/lib/mock/f41-build-816603-150289/root/chroot_tmpdir/scmroot/perl-Gnome2-Canvas'...
$ git fetch origin 9ecf1ff2e5d214dd0ffe90d3a7d0985016f7eadc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Gnome2-Canvas
 * [new ref]         9ecf1ff2e5d214dd0ffe90d3a7d0985016f7eadc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9ecf1ff Perl 5.40 rebuild