$ git clone -n https://src.fedoraproject.org/rpms/libQGLViewer.git /var/lib/mock/f45-build-15773-479/root/chroot_tmpdir/scmroot/libQGLViewer
Cloning into '/var/lib/mock/f45-build-15773-479/root/chroot_tmpdir/scmroot/libQGLViewer'...
$ git fetch origin bf1b72570569eee44211a88ea1f3e0ef33aa3876:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libQGLViewer
 * [new ref]         bf1b72570569eee44211a88ea1f3e0ef33aa3876 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bf1b725 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild