$ git clone -n https://src.fedoraproject.org/rpms/perl-OpenGL-GLUT.git /var/lib/mock/f41-build-816115-149998/root/chroot_tmpdir/scmroot/perl-OpenGL-GLUT
Cloning into '/var/lib/mock/f41-build-816115-149998/root/chroot_tmpdir/scmroot/perl-OpenGL-GLUT'...
$ git fetch origin 6074319464bf99d2dc8e6dbdb226943a4e1b1fb7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-OpenGL-GLUT
 * [new ref]         6074319464bf99d2dc8e6dbdb226943a4e1b1fb7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6074319 Perl 5.40 rebuild