$ git clone -n https://src.fedoraproject.org/rpms/owfs.git /var/lib/mock/f42-build-3446091-45465/root/chroot_tmpdir/scmroot/owfs
Cloning into '/var/lib/mock/f42-build-3446091-45465/root/chroot_tmpdir/scmroot/owfs'...
$ git fetch origin c3a367b4f33d682b6a954f49998d34b1b15a6e66:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/owfs
 * [new ref]         c3a367b4f33d682b6a954f49998d34b1b15a6e66 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c3a367b Add sysusers.d config file to allow rpm to create users/groups automatically