$ git clone -n https://src.fedoraproject.org/rpms/perl-Gtk2-GladeXML.git /var/lib/mock/f41-build-816758-150376/root/chroot_tmpdir/scmroot/perl-Gtk2-GladeXML
Cloning into '/var/lib/mock/f41-build-816758-150376/root/chroot_tmpdir/scmroot/perl-Gtk2-GladeXML'...
$ git fetch origin 228b983885c67f1217d42dbb70d6c27c45a48ca8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Gtk2-GladeXML
 * [new ref]         228b983885c67f1217d42dbb70d6c27c45a48ca8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 228b983 Perl 5.40 rebuild