$ git clone -n https://src.fedoraproject.org/rpms/perl-OpenGL.git /var/lib/mock/f41-build-823390-14353/root/chroot_tmpdir/scmroot/perl-OpenGL
Cloning into '/var/lib/mock/f41-build-823390-14353/root/chroot_tmpdir/scmroot/perl-OpenGL'...
$ git fetch origin 64745e1ef952d36ee28a217eb01d95ae2b6fada1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-OpenGL
 * [new ref]         64745e1ef952d36ee28a217eb01d95ae2b6fada1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 64745e1 Eliminate use of obsolete %patchN syntax (#2283636)