$ git clone -n https://src.fedoraproject.org/rpms/perl-Gtk3-ImageView.git /var/lib/mock/f45-build-23846-599/root/chroot_tmpdir/scmroot/perl-Gtk3-ImageView
Cloning into '/var/lib/mock/f45-build-23846-599/root/chroot_tmpdir/scmroot/perl-Gtk3-ImageView'...
$ git fetch origin 157fd183829a92057ccf3f2427bad68ec1db4b34:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Gtk3-ImageView
 * [new ref]         157fd183829a92057ccf3f2427bad68ec1db4b34 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 157fd18 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild