$ git clone -n https://src.fedoraproject.org/rpms/mingw-openexr.git /var/lib/mock/f45-build-18615-524/root/chroot_tmpdir/scmroot/mingw-openexr
Cloning into '/var/lib/mock/f45-build-18615-524/root/chroot_tmpdir/scmroot/mingw-openexr'...
$ git fetch origin 8edd82add6de62fd67fab0cf0367178c27ba1b98:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/mingw-openexr
 * [new ref]         8edd82add6de62fd67fab0cf0367178c27ba1b98 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8edd82a Update to 3.4.15