$ git clone -n https://src.fedoraproject.org/rpms/rubygem-opengl.git /var/lib/mock/f41-build-808659-145987/root/chroot_tmpdir/scmroot/rubygem-opengl
Cloning into '/var/lib/mock/f41-build-808659-145987/root/chroot_tmpdir/scmroot/rubygem-opengl'...
$ git reset --hard 8a09e4971945e9849233607399f9f89bdc26c83b
HEAD is now at 8a09e49 fix spec