$ git clone -n https://src.fedoraproject.org/rpms/oath-toolkit.git /var/lib/mock/f40-build-2228855-53101/root/chroot_tmpdir/scmroot/oath-toolkit
Cloning into '/var/lib/mock/f40-build-2228855-53101/root/chroot_tmpdir/scmroot/oath-toolkit'...
$ git fetch origin c96c66bedb5f8a34bbddb7832a432020c5456a92:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/oath-toolkit
 * [new ref]         c96c66bedb5f8a34bbddb7832a432020c5456a92 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c96c66b New version