$ git clone -n https://src.fedoraproject.org/rpms/opensubdiv.git /var/lib/mock/f42-build-side-1-3554949-46650/root/chroot_tmpdir/scmroot/opensubdiv
Cloning into '/var/lib/mock/f42-build-side-1-3554949-46650/root/chroot_tmpdir/scmroot/opensubdiv'...
$ git fetch origin fb27f64a61a5eb8fc123132213870dcb4211872e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/opensubdiv
 * [new ref]         fb27f64a61a5eb8fc123132213870dcb4211872e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fb27f64 Do not compile static libraries