$ git clone -n https://src.fedoraproject.org/rpms/perl-Gtk2-GladeXML.git /var/lib/mock/f45-build-23839-599/root/chroot_tmpdir/scmroot/perl-Gtk2-GladeXML
Cloning into '/var/lib/mock/f45-build-23839-599/root/chroot_tmpdir/scmroot/perl-Gtk2-GladeXML'...
$ git fetch origin da0d5a078b851dc28686ea21d88badf99dc9b6b1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Gtk2-GladeXML
 * [new ref]         da0d5a078b851dc28686ea21d88badf99dc9b6b1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at da0d5a0 Perl 5.44 rebuild