$ git clone -n https://src.fedoraproject.org/rpms/perl-OpenGL.git /var/lib/mock/f45-build-25435-611/root/chroot_tmpdir/scmroot/perl-OpenGL
Cloning into '/var/lib/mock/f45-build-25435-611/root/chroot_tmpdir/scmroot/perl-OpenGL'...
$ git fetch origin c1ff8b7ad23af7788be4f81a6b2644ae513c57ce:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-OpenGL
 * [new ref]         c1ff8b7ad23af7788be4f81a6b2644ae513c57ce -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c1ff8b7 Perl 5.44 rebuild