$ git clone -n https://src.fedoraproject.org/rpms/perl-Gtk2-TrayIcon.git /var/lib/mock/f41-build-816633-150311/root/chroot_tmpdir/scmroot/perl-Gtk2-TrayIcon
Cloning into '/var/lib/mock/f41-build-816633-150311/root/chroot_tmpdir/scmroot/perl-Gtk2-TrayIcon'...
$ git fetch origin 5bd4f27569ec07262340c2dc798d910e2337fc56:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Gtk2-TrayIcon
 * [new ref]         5bd4f27569ec07262340c2dc798d910e2337fc56 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5bd4f27 Perl 5.40 rebuild