$ git clone -n https://src.fedoraproject.org/rpms/rubygem-opengl.git /var/lib/mock/f40-build-1780563-24818/root/chroot_tmpdir/scmroot/rubygem-opengl
Cloning into '/var/lib/mock/f40-build-1780563-24818/root/chroot_tmpdir/scmroot/rubygem-opengl'...
$ git fetch origin 676369d0cf2e0c6df30b24ffa6172192afab053b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-opengl
 * [new ref]         676369d0cf2e0c6df30b24ffa6172192afab053b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 676369d Use regex match for test result