$ git clone -n https://src.fedoraproject.org/rpms/perl-Gtk2-Notify.git /var/lib/mock/f43-perl-60958439-6586769/root/chroot_tmpdir/scmroot/perl-Gtk2-Notify
Cloning into '/var/lib/mock/f43-perl-60958439-6586769/root/chroot_tmpdir/scmroot/perl-Gtk2-Notify'...
$ git fetch origin 4a4f03b416cb2aa8dbbf6fdd785a03795fa4b7ed:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Gtk2-Notify
 * [new ref]         4a4f03b416cb2aa8dbbf6fdd785a03795fa4b7ed -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4a4f03b Perl 5.42 rebuild